feat: add proxy to electrum

Author: reez

bdk-ffi/src/bdk.udl

@@ -986,6 +986,10 @@ interface ElectrumClient {
   [Throws=ElectrumError]
   constructor(string url);
 
+  /// Set the proxy of the builder
+  [Name=new_with_proxy, Throws=ElectrumError]
+  constructor(string url, string proxy);
+
   /// Full scan the keychain scripts specified with the blockchain (via an Electrum client) and
   /// returns updates for bdk_chain data structures.
   ///

bdk-ffi/src/electrum.rs

@@ -32,6 +32,18 @@ impl ElectrumClient {
         Ok(Self(client))
     }
 
+    pub fn new_with_proxy(url: String, proxy: String) -> Result<Self, ElectrumError> {
+        let config = bdk_electrum::electrum_client::ConfigBuilder::new()
+            .socks5(Some(bdk_electrum::electrum_client::Socks5Config::new(
+                proxy.as_str(),
+            )))
+            .build();
+        let inner_client =
+            bdk_electrum::electrum_client::Client::from_config(url.as_str(), config)?;
+        let client = BdkBdkElectrumClient::new(inner_client);
+        Ok(Self(client))
+    }
+
     pub fn full_scan(
         &self,
         request: Arc<FullScanRequest>,