feat: expose Wallet::policies method

bdk-ffi/src/bdk.udl

@@ -401,6 +401,9 @@ interface Wallet {
 
   string descriptor_checksum(KeychainKind keychain);
 
+  [Throws=DescriptorError]
+  Policy? policies(KeychainKind keychain);
+
   Balance balance();
 
   [Throws=CannotConnectError]
@@ -441,6 +444,8 @@ interface Wallet {
 
 interface Update {};
 
+interface Policy {};
+
 interface TxBuilder {
   constructor();
 

bdk-ffi/src/lib.rs

@@ -57,6 +57,7 @@ use crate::types::FullScanRequestBuilder;
 use crate::types::FullScanScriptInspector;
 use crate::types::KeychainAndIndex;
 use crate::types::LocalOutput;
+use crate::types::Policy;
 use crate::types::ScriptAmount;
 use crate::types::SentAndReceivedValues;
 use crate::types::SyncRequest;

bdk-ffi/src/types.rs

@@ -15,12 +15,12 @@ use bdk_wallet::chain::tx_graph::CanonicalTx as BdkCanonicalTx;
 use bdk_wallet::chain::{
     ChainPosition as BdkChainPosition, ConfirmationBlockTime as BdkConfirmationBlockTime,
 };
+use bdk_wallet::descriptor::Policy as BdkPolicy;
 use bdk_wallet::AddressInfo as BdkAddressInfo;
 use bdk_wallet::Balance as BdkBalance;
 use bdk_wallet::KeychainKind;
 use bdk_wallet::LocalOutput as BdkLocalOutput;
 use bdk_wallet::Update as BdkUpdate;
-
 use std::sync::{Arc, Mutex};
 
 #[derive(Debug)]
@@ -237,3 +237,17 @@ pub struct KeychainAndIndex {
     pub keychain: KeychainKind,
     pub index: u32,
 }
+
+/// Descriptor spending policy
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub struct Policy(BdkPolicy);
+impl From<BdkPolicy> for Policy {
+    fn from(value: BdkPolicy) -> Self {
+        Policy(value)
+    }
+}
+impl From<Policy> for BdkPolicy {
+    fn from(value: Policy) -> Self {
+        value.0
+    }
+}

bdk-ffi/src/wallet.rs

@@ -1,13 +1,13 @@
 use crate::bitcoin::{Psbt, Transaction};
 use crate::descriptor::Descriptor;
 use crate::error::{
-    CalculateFeeError, CannotConnectError, CreateWithPersistError, LoadWithPersistError,
-    SignerError, SqliteError, TxidParseError,
+    CalculateFeeError, CannotConnectError, CreateWithPersistError, DescriptorError,
+    LoadWithPersistError, SignerError, SqliteError, TxidParseError,
 };
 use crate::store::Connection;
 use crate::types::{
     AddressInfo, Balance, CanonicalTx, FullScanRequestBuilder, KeychainAndIndex, LocalOutput,
-    SentAndReceivedValues, SyncRequestBuilder, Update,
+    Policy, SentAndReceivedValues, SyncRequestBuilder, Update,
 };
 
 use bitcoin_ffi::{Amount, FeeRate, OutPoint, Script};
@@ -139,6 +139,13 @@ impl Wallet {
         self.get_wallet().descriptor_checksum(keychain)
     }
 
+    pub fn policies(&self, keychain: KeychainKind) -> Result<Option<Arc<Policy>>, DescriptorError> {
+        self.get_wallet()
+            .policies(keychain)
+            .map_err(DescriptorError::from)
+            .map(|e| e.map(|p| Arc::new(p.into())))
+    }
+
     pub fn network(&self) -> Network {
         self.get_wallet().network()
     }
@@ -154,8 +161,7 @@ impl Wallet {
 
     pub(crate) fn sign(
         &self,
-        psbt: Arc<Psbt>,
-        // sign_options: Option<SignOptions>,
+        psbt: Arc<Psbt>, // sign_options: Option<SignOptions>,
     ) -> Result<bool, SignerError> {
         let mut psbt = psbt.0.lock().unwrap();
         self.get_wallet()