feat: add broadcast method on esplora blocking client

bdk-ffi/src/bdk.udl

@@ -221,6 +221,9 @@ interface EsploraClient {
 
   [Throws=BdkError]
   Update scan(Wallet wallet, u64 stop_gap, u64 parallel_requests);
+
+  [Throws=BdkError]
+  void broadcast(Transaction transaction);
 };
 
 // ------------------------------------------------------------------------

bdk-ffi/src/bitcoin.rs

@@ -209,6 +209,12 @@ impl From<BdkTransaction> for Transaction {
     }
 }
 
+impl From<Transaction> for BdkTransaction {
+    fn from(tx: Transaction) -> Self {
+        tx.inner
+    }
+}
+
 pub struct PartiallySignedTransaction {
     pub(crate) inner: Mutex<BdkPartiallySignedTransaction>,
 }

bdk-ffi/src/esplora.rs

@@ -1,4 +1,5 @@
 use crate::wallet::{Update, Wallet};
+use std::ops::Deref;
 
 use bdk::wallet::Update as BdkUpdate;
 use bdk::Error as BdkError;
@@ -56,7 +57,12 @@ impl EsploraClient {
 
     // pub fn sync();
 
-    // pub fn broadcast();
+    pub fn broadcast(&self, transaction: Arc<crate::bitcoin::Transaction>) -> Result<(), BdkError> {
+        let bdk_transaction: bdk::bitcoin::Transaction = transaction.deref().clone().into();
+        self.0
+            .broadcast(&bdk_transaction)
+            .map_err(|e| BdkError::Generic(e.to_string()))
+    }
 
     // pub fn estimate_fee();
 }

bdk-ffi/src/wallet.rs

@@ -7,8 +7,8 @@ use std::collections::HashSet;
 use bdk::bitcoin::blockdata::script::ScriptBuf as BdkScriptBuf;
 use bdk::bitcoin::OutPoint as BdkOutPoint;
 use bdk::wallet::Update as BdkUpdate;
-use bdk::{SignOptions, Wallet as BdkWallet};
 use bdk::{Error as BdkError, FeeRate};
+use bdk::{SignOptions, Wallet as BdkWallet};
 
 use bdk::wallet::tx_builder::ChangeSpendPolicy;
 use std::sync::{Arc, Mutex, MutexGuard};
@@ -88,10 +88,9 @@ impl Wallet {
         // sign_options: Option<SignOptions>,
     ) -> Result<bool, BdkError> {
         let mut psbt = psbt.inner.lock().unwrap();
-        self.get_wallet().sign(
-            &mut psbt,
-            SignOptions::default(),
-        ).map_err(|e| BdkError::Generic(e.to_string()))
+        self.get_wallet()
+            .sign(&mut psbt, SignOptions::default())
+            .map_err(|e| BdkError::Generic(e.to_string()))
     }
 }