refactor: migrate EsploraClient type to procedural macros

Author: thunderbiscuit

bdk-ffi/src/bdk.udl

@@ -622,65 +622,6 @@ interface Descriptor {
   sequence<Descriptor> to_single_descriptors();
 };
 
-// ------------------------------------------------------------------------
-// bdk_esplora crate
-// ------------------------------------------------------------------------
-
-/// Wrapper around an esplora_client::BlockingClient which includes an internal in-memory transaction
-/// cache to avoid re-fetching already downloaded transactions.
-interface EsploraClient {
-  /// Creates a new bdk client from a esplora_client::BlockingClient
-  /// Optional: Set the proxy of the builder
-  constructor(string url, optional string? proxy = null);
-
-  /// Scan keychain scripts for transactions against Esplora, returning an update that can be
-  /// applied to the receiving structures.
-  ///
-  /// `request` provides the data required to perform a script-pubkey-based full scan
-  /// (see [`FullScanRequest`]). The full scan for each keychain (`K`) stops after a gap of
-  /// `stop_gap` script pubkeys with no associated transactions. `parallel_requests` specifies
-  /// the maximum number of HTTP requests to make in parallel.
-  [Throws=EsploraError]
-  Update full_scan(FullScanRequest request, u64 stop_gap, u64 parallel_requests);
-
-  /// Sync a set of scripts, txids, and/or outpoints against Esplora.
-  ///
-  /// `request` provides the data required to perform a script-pubkey-based sync (see
-  /// [`SyncRequest`]). `parallel_requests` specifies the maximum number of HTTP requests to make
-  /// in parallel.
-  [Throws=EsploraError]
-  Update sync(SyncRequest request, u64 parallel_requests);
-
-  /// Broadcast a [`Transaction`] to Esplora.
-  [Throws=EsploraError]
-  void broadcast([ByRef] Transaction transaction);
-
-  /// Get a [`Transaction`] option given its [`Txid`].
-  [Throws=EsploraError]
-  Transaction? get_tx(string txid);
-
-  /// Get the height of the current blockchain tip.
-  [Throws=EsploraError]
-  u32 get_height();
-
-  /// Get a map where the key is the confirmation target (in number of
-  /// blocks) and the value is the estimated feerate (in sat/vB).
-  [Throws=EsploraError]
-  record<u16, f64> get_fee_estimates();
-
-  /// Get the [`BlockHash`] of a specific block height
-  [Throws=EsploraError]
-  string get_block_hash(u32 block_height);
-
-  /// Get the status of a [`Transaction`] given its [`Txid`].
-  [Throws=EsploraError]
-  TxStatus get_tx_status(string txid);
-
-  /// Get transaction info given it's [`Txid`].
-  [Throws=EsploraError]
-  Tx? get_tx_info(string txid);
-};
-
 // ------------------------------------------------------------------------
 // bdk_electrum crate
 // ------------------------------------------------------------------------

bdk-ffi/src/esplora.rs

@@ -22,11 +22,14 @@ use std::sync::Arc;
 
 /// Wrapper around an esplora_client::BlockingClient which includes an internal in-memory transaction
 /// cache to avoid re-fetching already downloaded transactions.
+#[derive(uniffi::Object)]
 pub struct EsploraClient(BlockingClient);
 
+#[uniffi::export]
 impl EsploraClient {
     /// Creates a new bdk client from an esplora_client::BlockingClient.
     /// Optional: Set the proxy of the builder.
+    #[uniffi::constructor(default(proxy = None))]
     pub fn new(url: String, proxy: Option<String>) -> Self {
         let mut builder = Builder::new(url.as_str());
         if let Some(proxy) = proxy {

bdk-ffi/src/lib.rs

@@ -44,7 +44,6 @@ use crate::error::PsbtFinalizeError;
 use crate::error::PsbtParseError;
 use crate::error::RequestBuilderError;
 use crate::error::TransactionError;
-use crate::esplora::EsploraClient;
 use crate::keys::DerivationPath;
 use crate::keys::DescriptorPublicKey;
 use crate::keys::DescriptorSecretKey;