Merge bitcoindevkit/rust-electrum-client#195: feat(ci): add justfile

df6675dc09 fix(docs): fix `bitcoin::block::Header` link (Luis Schwab)
4b98565ee2 feat(ci): add justfile (Luis Schwab)

Pull request description:

  This PR adds a `justfile` stolen from `rust-esplora-client`.

ACKs for top commit:
  oleonardolima:
    tACK df6675dc09

Tree-SHA512: 8d8f43c27631d7dc1c0eac28e01828510118a0600c762e9459b779a6423ceb6b1e3000f5c797d065a2ef6e511e2c47f6ad7bcf0182a515e573fc097e74f9e04b

.github/workflows/cont_integration.yml

@@ -5,7 +5,7 @@ name: CI
 jobs:
   test:
     name: Test
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     env:
       TEST_ELECTRUM_SERVER: electrum.blockstream.info:50001
     strategy:
@@ -17,7 +17,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
@@ -41,6 +41,7 @@ jobs:
       - run: cargo check --verbose --no-default-features --features=proxy,use-openssl
       - run: cargo check --verbose --no-default-features --features=proxy,use-rustls
       - run: cargo check --verbose --no-default-features --features=proxy,use-rustls-ring
+      - run: cargo check --verbose --no-default-features --features=proxy,use-rustls,use-rustls-ring
 
   fmt:
     name: Rust fmt
@@ -61,13 +62,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: 1.84.0
+          toolchain: 1.90.0
           components: clippy
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2.2.1
-      - uses: actions-rs/clippy-check@v1
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          args: --all-features --all-targets -- -D warnings
+      - run: cargo clippy --all-features --all-targets -- -D warnings

CHANGELOG.md

@@ -9,6 +9,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.24.1]
+ - Default to `ring` if multiple `rustls` features are set #183
+
+## [0.24.0]
+ - Use default `CryptoProvider` if available, otherwise install `rustls`'s `CryptoProvider` based on features #171
+ - Add a new batch method for `blockchain.transaction.get_merkle` #170
+
+## [0.23.1]
+ - Fix batch request to Electrum servers out of order responses #160
+ - Allow types that references to `ElectrumApi` to also implement it #163
 
 ## [0.23.0]
 
@@ -45,9 +55,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  - Revert "errors if expecting headers notification but not subscribed" #115
 
 [0.18.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.17.0...0.18.0
-[0.19.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.18.0...v0.19.0
-[0.20.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.19.0...v0.20.0
-[0.21.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.20.0...v0.21.0
-[0.22.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.21.0...v0.22.0
-[0.23.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.22.0...v0.23.0
-[Unreleased]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.23.0...HEAD
+[0.19.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.18.0...0.19.0
+[0.20.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.19.0...0.20.0
+[0.21.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.20.0...0.21.0
+[0.22.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.21.0...0.22.0
+[0.23.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.22.0...0.23.0
+[0.23.1]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.23.0...0.23.1
+[0.24.0]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.23.1...0.24.0
+[0.24.1]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.24.0...0.24.1
+[Unreleased]: https://github.com/bitcoindevkit/rust-electrum-client/compare/0.24.1...HEAD

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "electrum-client"
-version = "0.23.0"
+version = "0.24.1"
 authors = ["Alekos Filini <alekos.filini@gmail.com>"]
 license = "MIT"
 homepage = "https://github.com/bitcoindevkit/rust-electrum-client"

justfile

@@ -0,0 +1,34 @@
+alias b := build
+alias c := check
+alias f := fmt
+alias t := test
+alias p := pre-push
+
+_default:
+   @just --list
+
+# Build the project
+build:
+   cargo build
+
+# Check code: formatting, compilation, linting, doc comments, and commit signature
+check:
+   cargo +nightly fmt --all -- --check
+   cargo check --all-features --all-targets
+   cargo clippy --all-features --all-targets -- -D warnings
+   RUSTDOCFLAGS="-D warnings" cargo doc --all-features --no-deps
+   @[ "$(git log --pretty='format:%G?' -1 HEAD)" = "N" ] && \
+       echo "\n⚠️  Unsigned commit: BDK requires that commits be signed." || \
+       true
+
+# Format all code
+fmt:
+   cargo +nightly fmt
+
+# Run all tests on the workspace with all features
+test:
+   cargo test --all-features -- --test-threads=1
+
+# Run pre-push suite: format, check, and test
+pre-push: fmt check test
+

src/api.rs

@@ -2,6 +2,7 @@
 
 use std::borrow::Borrow;
 use std::convert::TryInto;
+use std::ops::Deref;
 
 use bitcoin::consensus::encode::{deserialize, serialize};
 use bitcoin::{block, Script, Transaction, Txid};
@@ -9,6 +10,178 @@ use bitcoin::{block, Script, Transaction, Txid};
 use crate::batch::Batch;
 use crate::types::*;
 
+impl<E: Deref> ElectrumApi for E
+where
+    E::Target: ElectrumApi,
+{
+    fn raw_call(
+        &self,
+        method_name: &str,
+        params: impl IntoIterator<Item = Param>,
+    ) -> Result<serde_json::Value, Error> {
+        (**self).raw_call(method_name, params)
+    }
+
+    fn batch_call(&self, batch: &Batch) -> Result<Vec<serde_json::Value>, Error> {
+        (**self).batch_call(batch)
+    }
+
+    fn block_headers_subscribe_raw(&self) -> Result<RawHeaderNotification, Error> {
+        (**self).block_headers_subscribe_raw()
+    }
+
+    fn block_headers_pop_raw(&self) -> Result<Option<RawHeaderNotification>, Error> {
+        (**self).block_headers_pop_raw()
+    }
+
+    fn block_header_raw(&self, height: usize) -> Result<Vec<u8>, Error> {
+        (**self).block_header_raw(height)
+    }
+
+    fn block_headers(&self, start_height: usize, count: usize) -> Result<GetHeadersRes, Error> {
+        (**self).block_headers(start_height, count)
+    }
+
+    fn estimate_fee(&self, number: usize) -> Result<f64, Error> {
+        (**self).estimate_fee(number)
+    }
+
+    fn relay_fee(&self) -> Result<f64, Error> {
+        (**self).relay_fee()
+    }
+
+    fn script_subscribe(&self, script: &Script) -> Result<Option<ScriptStatus>, Error> {
+        (**self).script_subscribe(script)
+    }
+
+    fn batch_script_subscribe<'s, I>(&self, scripts: I) -> Result<Vec<Option<ScriptStatus>>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<&'s Script>,
+    {
+        (**self).batch_script_subscribe(scripts)
+    }
+
+    fn script_unsubscribe(&self, script: &Script) -> Result<bool, Error> {
+        (**self).script_unsubscribe(script)
+    }
+
+    fn script_pop(&self, script: &Script) -> Result<Option<ScriptStatus>, Error> {
+        (**self).script_pop(script)
+    }
+
+    fn script_get_balance(&self, script: &Script) -> Result<GetBalanceRes, Error> {
+        (**self).script_get_balance(script)
+    }
+
+    fn batch_script_get_balance<'s, I>(&self, scripts: I) -> Result<Vec<GetBalanceRes>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<&'s Script>,
+    {
+        (**self).batch_script_get_balance(scripts)
+    }
+
+    fn script_get_history(&self, script: &Script) -> Result<Vec<GetHistoryRes>, Error> {
+        (**self).script_get_history(script)
+    }
+
+    fn batch_script_get_history<'s, I>(&self, scripts: I) -> Result<Vec<Vec<GetHistoryRes>>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<&'s Script>,
+    {
+        (**self).batch_script_get_history(scripts)
+    }
+
+    fn script_list_unspent(&self, script: &Script) -> Result<Vec<ListUnspentRes>, Error> {
+        (**self).script_list_unspent(script)
+    }
+
+    fn batch_script_list_unspent<'s, I>(
+        &self,
+        scripts: I,
+    ) -> Result<Vec<Vec<ListUnspentRes>>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<&'s Script>,
+    {
+        (**self).batch_script_list_unspent(scripts)
+    }
+
+    fn transaction_get_raw(&self, txid: &Txid) -> Result<Vec<u8>, Error> {
+        (**self).transaction_get_raw(txid)
+    }
+
+    fn batch_transaction_get_raw<'t, I>(&self, txids: I) -> Result<Vec<Vec<u8>>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<&'t Txid>,
+    {
+        (**self).batch_transaction_get_raw(txids)
+    }
+
+    fn batch_block_header_raw<I>(&self, heights: I) -> Result<Vec<Vec<u8>>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<u32>,
+    {
+        (**self).batch_block_header_raw(heights)
+    }
+
+    fn batch_estimate_fee<I>(&self, numbers: I) -> Result<Vec<f64>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<usize>,
+    {
+        (**self).batch_estimate_fee(numbers)
+    }
+
+    fn transaction_broadcast_raw(&self, raw_tx: &[u8]) -> Result<Txid, Error> {
+        (**self).transaction_broadcast_raw(raw_tx)
+    }
+
+    fn transaction_get_merkle(&self, txid: &Txid, height: usize) -> Result<GetMerkleRes, Error> {
+        (**self).transaction_get_merkle(txid, height)
+    }
+
+    fn batch_transaction_get_merkle<I>(
+        &self,
+        txids_and_heights: I,
+    ) -> Result<Vec<GetMerkleRes>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<(Txid, usize)>,
+    {
+        (**self).batch_transaction_get_merkle(txids_and_heights)
+    }
+
+    fn txid_from_pos(&self, height: usize, tx_pos: usize) -> Result<Txid, Error> {
+        (**self).txid_from_pos(height, tx_pos)
+    }
+
+    fn txid_from_pos_with_merkle(
+        &self,
+        height: usize,
+        tx_pos: usize,
+    ) -> Result<TxidFromPosRes, Error> {
+        (**self).txid_from_pos_with_merkle(height, tx_pos)
+    }
+
+    fn server_features(&self) -> Result<ServerFeaturesRes, Error> {
+        (**self).server_features()
+    }
+
+    fn ping(&self) -> Result<(), Error> {
+        (**self).ping()
+    }
+
+    #[cfg(feature = "debug-calls")]
+    fn calls_made(&self) -> Result<usize, Error> {
+        (**self).calls_made()
+    }
+}
+
 /// API calls exposed by an Electrum client
 pub trait ElectrumApi {
     /// Gets the block header for height `height`.
@@ -200,6 +373,17 @@ pub trait ElectrumApi {
     /// Returns the merkle path for the transaction `txid` confirmed in the block at `height`.
     fn transaction_get_merkle(&self, txid: &Txid, height: usize) -> Result<GetMerkleRes, Error>;
 
+    /// Batch version of [`transaction_get_merkle`](#method.transaction_get_merkle).
+    ///
+    /// Take a list of `(txid, height)`, for transactions with `txid` confirmed in the block at `height`.
+    fn batch_transaction_get_merkle<I>(
+        &self,
+        txids_and_heights: I,
+    ) -> Result<Vec<GetMerkleRes>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<(Txid, usize)>;
+
     /// Returns a transaction hash, given a block `height` and a `tx_pos` in the block.
     fn txid_from_pos(&self, height: usize, tx_pos: usize) -> Result<Txid, Error>;
 
@@ -222,3 +406,225 @@ pub trait ElectrumApi {
     /// Returns the number of network calls made since the creation of the client.
     fn calls_made(&self) -> Result<usize, Error>;
 }
+
+#[cfg(test)]
+mod test {
+    use std::{borrow::Cow, sync::Arc};
+
+    use super::ElectrumApi;
+
+    #[derive(Debug, Clone)]
+    struct FakeApi;
+
+    impl ElectrumApi for FakeApi {
+        fn raw_call(
+            &self,
+            _: &str,
+            _: impl IntoIterator<Item = super::Param>,
+        ) -> Result<serde_json::Value, super::Error> {
+            unreachable!()
+        }
+
+        fn batch_call(&self, _: &crate::Batch) -> Result<Vec<serde_json::Value>, super::Error> {
+            unreachable!()
+        }
+
+        fn block_headers_subscribe_raw(
+            &self,
+        ) -> Result<super::RawHeaderNotification, super::Error> {
+            unreachable!()
+        }
+
+        fn block_headers_pop_raw(
+            &self,
+        ) -> Result<Option<super::RawHeaderNotification>, super::Error> {
+            unreachable!()
+        }
+
+        fn block_header_raw(&self, _: usize) -> Result<Vec<u8>, super::Error> {
+            unreachable!()
+        }
+
+        fn block_headers(&self, _: usize, _: usize) -> Result<super::GetHeadersRes, super::Error> {
+            unreachable!()
+        }
+
+        fn estimate_fee(&self, _: usize) -> Result<f64, super::Error> {
+            unreachable!()
+        }
+
+        fn relay_fee(&self) -> Result<f64, super::Error> {
+            unreachable!()
+        }
+
+        fn script_subscribe(
+            &self,
+            _: &bitcoin::Script,
+        ) -> Result<Option<super::ScriptStatus>, super::Error> {
+            unreachable!()
+        }
+
+        fn batch_script_subscribe<'s, I>(
+            &self,
+            _: I,
+        ) -> Result<Vec<Option<super::ScriptStatus>>, super::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<&'s bitcoin::Script>,
+        {
+            unreachable!()
+        }
+
+        fn script_unsubscribe(&self, _: &bitcoin::Script) -> Result<bool, super::Error> {
+            unreachable!()
+        }
+
+        fn script_pop(
+            &self,
+            _: &bitcoin::Script,
+        ) -> Result<Option<super::ScriptStatus>, super::Error> {
+            unreachable!()
+        }
+
+        fn script_get_balance(
+            &self,
+            _: &bitcoin::Script,
+        ) -> Result<super::GetBalanceRes, super::Error> {
+            unreachable!()
+        }
+
+        fn batch_script_get_balance<'s, I>(
+            &self,
+            _: I,
+        ) -> Result<Vec<super::GetBalanceRes>, super::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<&'s bitcoin::Script>,
+        {
+            unreachable!()
+        }
+
+        fn script_get_history(
+            &self,
+            _: &bitcoin::Script,
+        ) -> Result<Vec<super::GetHistoryRes>, super::Error> {
+            unreachable!()
+        }
+
+        fn batch_script_get_history<'s, I>(
+            &self,
+            _: I,
+        ) -> Result<Vec<Vec<super::GetHistoryRes>>, super::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<&'s bitcoin::Script>,
+        {
+            unreachable!()
+        }
+
+        fn script_list_unspent(
+            &self,
+            _: &bitcoin::Script,
+        ) -> Result<Vec<super::ListUnspentRes>, super::Error> {
+            unreachable!()
+        }
+
+        fn batch_script_list_unspent<'s, I>(
+            &self,
+            _: I,
+        ) -> Result<Vec<Vec<super::ListUnspentRes>>, super::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<&'s bitcoin::Script>,
+        {
+            unreachable!()
+        }
+
+        fn transaction_get_raw(&self, _: &bitcoin::Txid) -> Result<Vec<u8>, super::Error> {
+            unreachable!()
+        }
+
+        fn batch_transaction_get_raw<'t, I>(&self, _: I) -> Result<Vec<Vec<u8>>, super::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<&'t bitcoin::Txid>,
+        {
+            unreachable!()
+        }
+
+        fn batch_block_header_raw<I>(&self, _: I) -> Result<Vec<Vec<u8>>, super::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<u32>,
+        {
+            unreachable!()
+        }
+
+        fn batch_estimate_fee<I>(&self, _: I) -> Result<Vec<f64>, super::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<usize>,
+        {
+            unreachable!()
+        }
+
+        fn transaction_broadcast_raw(&self, _: &[u8]) -> Result<bitcoin::Txid, super::Error> {
+            unreachable!()
+        }
+
+        fn transaction_get_merkle(
+            &self,
+            _: &bitcoin::Txid,
+            _: usize,
+        ) -> Result<super::GetMerkleRes, super::Error> {
+            unreachable!()
+        }
+
+        fn batch_transaction_get_merkle<I>(
+            &self,
+            _: I,
+        ) -> Result<Vec<crate::GetMerkleRes>, crate::Error>
+        where
+            I: IntoIterator + Clone,
+            I::Item: std::borrow::Borrow<(bitcoin::Txid, usize)>,
+        {
+            unreachable!()
+        }
+
+        fn txid_from_pos(&self, _: usize, _: usize) -> Result<bitcoin::Txid, super::Error> {
+            unreachable!()
+        }
+
+        fn txid_from_pos_with_merkle(
+            &self,
+            _: usize,
+            _: usize,
+        ) -> Result<super::TxidFromPosRes, super::Error> {
+            unreachable!()
+        }
+
+        fn server_features(&self) -> Result<super::ServerFeaturesRes, super::Error> {
+            unreachable!()
+        }
+
+        fn ping(&self) -> Result<(), super::Error> {
+            unreachable!()
+        }
+
+        #[cfg(feature = "debug-calls")]
+        fn calls_made(&self) -> Result<usize, super::Error> {
+            unreachable!()
+        }
+    }
+
+    fn is_impl<A: ElectrumApi>() {}
+
+    #[test]
+    fn deref() {
+        is_impl::<FakeApi>();
+        is_impl::<&FakeApi>();
+        is_impl::<Arc<FakeApi>>();
+        is_impl::<Box<FakeApi>>();
+        is_impl::<Cow<FakeApi>>();
+    }
+}

src/batch.rs

@@ -62,6 +62,17 @@ impl Batch {
             .push((String::from("blockchain.transaction.get"), params));
     }
 
+    /// Add one `blockchain.transaction.get_merkle` request to the batch queue
+    pub fn transaction_get_merkle(&mut self, tx_hash_and_height: &(Txid, usize)) {
+        let (tx_hash, height) = tx_hash_and_height;
+        let params = vec![
+            Param::String(format!("{:x}", tx_hash)),
+            Param::Usize(*height),
+        ];
+        self.calls
+            .push((String::from("blockchain.transaction.get_merkle"), params));
+    }
+
     /// Add one `blockchain.estimatefee` request to the batch queue
     pub fn estimate_fee(&mut self, number: usize) {
         let params = vec![Param::Usize(number)];
@@ -77,7 +88,7 @@ impl Batch {
     }
 
     /// Returns an iterator on the batch
-    pub fn iter(&self) -> BatchIter {
+    pub fn iter(&self) -> BatchIter<'_> {
         BatchIter {
             batch: self,
             index: 0,

src/client.rs

@@ -327,6 +327,22 @@ impl ElectrumApi for Client {
         impl_inner_call!(self, transaction_get_merkle, txid, height)
     }
 
+    #[inline]
+    fn batch_transaction_get_merkle<I>(
+        &self,
+        txids_and_heights: I,
+    ) -> Result<Vec<GetMerkleRes>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<(Txid, usize)>,
+    {
+        impl_inner_call!(
+            self,
+            batch_transaction_get_merkle,
+            txids_and_heights.clone()
+        )
+    }
+
     #[inline]
     fn txid_from_pos(&self, height: usize, tx_pos: usize) -> Result<Txid, Error> {
         impl_inner_call!(self, txid_from_pos, height, tx_pos)
@@ -432,7 +448,9 @@ mod tests {
         let now = Instant::now();
         let client = Client::from_config(
             &endpoint,
-            crate::config::ConfigBuilder::new().timeout(Some(5)).build(),
+            crate::config::ConfigBuilder::new()
+                .timeout(Some(Duration::from_secs(5)))
+                .build(),
         );
         let elapsed = now.elapsed();
 

src/config.rs

@@ -55,8 +55,8 @@ impl ConfigBuilder {
     }
 
     /// Sets the timeout
-    pub fn timeout(mut self, timeout: Option<u8>) -> Self {
-        self.config.timeout = timeout.map(|t| Duration::from_secs(t as u64));
+    pub fn timeout(mut self, timeout: Option<Duration>) -> Self {
+        self.config.timeout = timeout;
         self
     }
 

src/raw_client.rs

@@ -3,7 +3,7 @@
 //! This module contains the definition of the raw client that wraps the transport method
 
 use std::borrow::Borrow;
-use std::collections::{BTreeMap, BTreeSet, HashMap, VecDeque};
+use std::collections::{BTreeMap, HashMap, VecDeque};
 use std::io::{BufRead, BufReader, Read, Write};
 use std::mem::drop;
 use std::net::{TcpStream, ToSocketAddrs};
@@ -406,6 +406,29 @@ impl RawClient<ElectrumSslStream> {
     ) -> Result<Self, Error> {
         use std::convert::TryFrom;
 
+        if rustls::crypto::CryptoProvider::get_default().is_none() {
+            // We install a crypto provider depending on the set feature.
+            #[cfg(all(feature = "use-rustls", not(feature = "use-rustls-ring")))]
+            rustls::crypto::CryptoProvider::install_default(
+                rustls::crypto::aws_lc_rs::default_provider(),
+            )
+            .map_err(|_| {
+                Error::CouldNotCreateConnection(rustls::Error::General(
+                    "Failed to install CryptoProvider".to_string(),
+                ))
+            })?;
+
+            #[cfg(feature = "use-rustls-ring")]
+            rustls::crypto::CryptoProvider::install_default(
+                rustls::crypto::ring::default_provider(),
+            )
+            .map_err(|_| {
+                Error::CouldNotCreateConnection(rustls::Error::General(
+                    "Failed to install CryptoProvider".to_string(),
+                ))
+            })?;
+        }
+
         let builder = ClientConfig::builder();
 
         let config = if validate_domain {
@@ -426,7 +449,7 @@ impl RawClient<ElectrumSslStream> {
             builder
                 .dangerous()
                 .with_custom_certificate_verifier(std::sync::Arc::new(
-                    #[cfg(feature = "use-rustls")]
+                    #[cfg(all(feature = "use-rustls", not(feature = "use-rustls-ring")))]
                     danger::NoCertificateVerification::new(rustls::crypto::aws_lc_rs::default_provider()),
                     #[cfg(feature = "use-rustls-ring")]
                     danger::NoCertificateVerification::new(rustls::crypto::ring::default_provider()),
@@ -539,11 +562,10 @@ impl<S: Read + Write> RawClient<S> {
 
                 if let Some(until_message) = until_message {
                     // If we are trying to start a reader thread but the corresponding sender is
-                    // missing from the map, exit immediately. This can happen with batch calls,
-                    // since the sender is shared for all the individual queries in a call. We
-                    // might have already received a response for that id, but we don't know it
-                    // yet. Exiting here forces the calling code to fallback to the sender-receiver
-                    // method, and it should find a message there waiting for it.
+                    // missing from the map, exit immediately. We might have already received a
+                    // response for that id, but we don't know it yet. Exiting here forces the
+                    // calling code to fallback to the sender-receiver method, and it should find
+                    // a message there waiting for it.
                     if self.waiting_map.lock()?.get(&until_message).is_none() {
                         return Err(Error::CouldntLockReader);
                     }
@@ -762,12 +784,10 @@ impl<T: Read + Write> ElectrumApi for RawClient<T> {
     fn batch_call(&self, batch: &Batch) -> Result<Vec<serde_json::Value>, Error> {
         let mut raw = Vec::new();
 
-        let mut missing_responses = BTreeSet::new();
+        let mut missing_responses = Vec::new();
         let mut answers = BTreeMap::new();
 
-        // Add our listener to the map before we send the request, Here we will clone the sender
-        // for every request id, so that we only have to monitor one receiver.
-        let (sender, receiver) = channel();
+        // Add our listener to the map before we send the request
 
         for (method, params) in batch.iter() {
             let req = Request::new_id(
@@ -775,9 +795,12 @@ impl<T: Read + Write> ElectrumApi for RawClient<T> {
                 method,
                 params.to_vec(),
             );
-            missing_responses.insert(req.id);
+            // Add distinct channel to each request so when we remove our request id (and sender) from the waiting_map
+            // we can be sure that the response gets sent to the correct channel in self.recv
+            let (sender, receiver) = channel();
+            missing_responses.push((req.id, receiver));
 
-            self.waiting_map.lock()?.insert(req.id, sender.clone());
+            self.waiting_map.lock()?.insert(req.id, sender);
 
             raw.append(&mut serde_json::to_vec(&req)?);
             raw.extend_from_slice(b"\n");
@@ -796,8 +819,8 @@ impl<T: Read + Write> ElectrumApi for RawClient<T> {
 
         self.increment_calls();
 
-        for req_id in missing_responses.iter() {
-            match self.recv(&receiver, *req_id) {
+        for (req_id, receiver) in missing_responses.iter() {
+            match self.recv(receiver, *req_id) {
                 Ok(mut resp) => answers.insert(req_id, resp["result"].take()),
                 Err(e) => {
                     // In case of error our sender could still be left in the map, depending on where
@@ -805,7 +828,7 @@ impl<T: Read + Write> ElectrumApi for RawClient<T> {
                     warn!("got error for req_id {}: {:?}", req_id, e);
                     warn!("removing all waiting req of this batch");
                     let mut guard = self.waiting_map.lock()?;
-                    for req_id in missing_responses.iter() {
+                    for (req_id, _) in missing_responses.iter() {
                         guard.remove(req_id);
                     }
                     return Err(e);
@@ -1102,6 +1125,17 @@ impl<T: Read + Write> ElectrumApi for RawClient<T> {
         Ok(serde_json::from_value(result)?)
     }
 
+    fn batch_transaction_get_merkle<I>(
+        &self,
+        txids_and_heights: I,
+    ) -> Result<Vec<GetMerkleRes>, Error>
+    where
+        I: IntoIterator + Clone,
+        I::Item: Borrow<(Txid, usize)>,
+    {
+        impl_batch_call!(self, txids_and_heights, transaction_get_merkle)
+    }
+
     fn txid_from_pos(&self, height: usize, tx_pos: usize) -> Result<Txid, Error> {
         let params = vec![Param::Usize(height), Param::Usize(tx_pos)];
         let req = Request::new_id(
@@ -1190,12 +1224,32 @@ mod test {
         assert_eq!(resp.hash_function, Some("sha256".into()));
         assert_eq!(resp.pruning, None);
     }
+
+    #[test]
+    #[ignore = "depends on a live server"]
+    fn test_batch_response_ordering() {
+        // The electrum.blockstream.info:50001 node always sends back ordered responses which will make this always pass.
+        // However, many servers do not, so we use one of those servers for this test.
+        let client = RawClient::new("exs.dyshek.org:50001", None).unwrap();
+        let heights: Vec<u32> = vec![1, 4, 8, 12, 222, 6666, 12];
+        let result_times = [
+            1231469665, 1231470988, 1231472743, 1231474888, 1231770653, 1236456633, 1231474888,
+        ];
+        // Check ordering 10 times. This usually fails within 5 if ordering is incorrect.
+        for _ in 0..10 {
+            let results = client.batch_block_header(&heights).unwrap();
+            for (index, result) in results.iter().enumerate() {
+                assert_eq!(result_times[index], result.time);
+            }
+        }
+    }
+
     #[test]
     fn test_relay_fee() {
         let client = RawClient::new(get_test_server(), None).unwrap();
 
         let resp = client.relay_fee().unwrap();
-        assert_eq!(resp, 0.00001);
+        assert!(resp > 0.0);
     }
 
     #[test]
@@ -1428,6 +1482,98 @@ mod test {
         ));
     }
 
+    #[test]
+    fn test_batch_transaction_get_merkle() {
+        use bitcoin::Txid;
+
+        struct TestCase {
+            txid: Txid,
+            block_height: usize,
+            exp_pos: usize,
+            exp_bytes: [u8; 32],
+        }
+
+        let client = RawClient::new(get_test_server(), None).unwrap();
+
+        let test_cases: Vec<TestCase> = vec![
+            TestCase {
+                txid: Txid::from_str(
+                    "1f7ff3c407f33eabc8bec7d2cc230948f2249ec8e591bcf6f971ca9366c8788d",
+                )
+                .unwrap(),
+                block_height: 630000,
+                exp_pos: 68,
+                exp_bytes: [
+                    34, 65, 51, 64, 49, 139, 115, 189, 185, 246, 70, 225, 168, 193, 217, 195, 47,
+                    66, 179, 240, 153, 24, 114, 215, 144, 196, 212, 41, 39, 155, 246, 25,
+                ],
+            },
+            TestCase {
+                txid: Txid::from_str(
+                    "70a8639bc9b743c0610d1231103a2f8e99f4a25670946b91f16c55a5373b37d1",
+                )
+                .unwrap(),
+                block_height: 630001,
+                exp_pos: 25,
+                exp_bytes: [
+                    169, 100, 34, 99, 168, 101, 25, 168, 184, 90, 77, 50, 151, 245, 130, 101, 193,
+                    229, 136, 128, 63, 110, 241, 19, 242, 59, 184, 137, 245, 249, 188, 110,
+                ],
+            },
+            TestCase {
+                txid: Txid::from_str(
+                    "a0db149ace545beabbd87a8d6b20ffd6aa3b5a50e58add49a3d435f898c272cf",
+                )
+                .unwrap(),
+                block_height: 840000,
+                exp_pos: 0,
+                exp_bytes: [
+                    43, 184, 95, 75, 0, 75, 230, 218, 84, 247, 102, 193, 124, 30, 133, 81, 135, 50,
+                    113, 18, 194, 49, 239, 47, 243, 94, 186, 208, 234, 103, 198, 158,
+                ],
+            },
+        ];
+
+        let txids_and_heights: Vec<(Txid, usize)> = test_cases
+            .iter()
+            .map(|case| (case.txid, case.block_height))
+            .collect();
+
+        let resp = client
+            .batch_transaction_get_merkle(&txids_and_heights)
+            .unwrap();
+
+        for (i, (res, test_case)) in resp.iter().zip(test_cases).enumerate() {
+            assert_eq!(res.block_height, test_case.block_height);
+            assert_eq!(res.pos, test_case.exp_pos);
+            assert_eq!(res.merkle.len(), 12);
+            assert_eq!(res.merkle[0], test_case.exp_bytes);
+
+            // Check we can verify the merkle proof validity, but fail if we supply wrong data.
+            let block_header = client.block_header(res.block_height).unwrap();
+            assert!(utils::validate_merkle_proof(
+                &txids_and_heights[i].0,
+                &block_header.merkle_root,
+                res
+            ));
+
+            let mut fail_res = res.clone();
+            fail_res.pos = 13;
+            assert!(!utils::validate_merkle_proof(
+                &txids_and_heights[i].0,
+                &block_header.merkle_root,
+                &fail_res
+            ));
+
+            let fail_block_header = client.block_header(res.block_height + 1).unwrap();
+            assert!(!utils::validate_merkle_proof(
+                &txids_and_heights[i].0,
+                &fail_block_header.merkle_root,
+                res
+            ));
+        }
+    }
+
     #[test]
     fn test_txid_from_pos() {
         use bitcoin::Txid;

src/socks/v4.rs

@@ -18,12 +18,7 @@ fn read_response(socket: &mut TcpStream) -> io::Result<SocketAddrV4> {
 
     match response.read_u8()? {
         90 => {}
-        91 => {
-            return Err(io::Error::new(
-                io::ErrorKind::Other,
-                "request rejected or failed",
-            ))
-        }
+        91 => return Err(io::Error::other("request rejected or failed")),
         92 => {
             return Err(io::Error::new(
                 io::ErrorKind::PermissionDenied,

src/socks/v5.rs

@@ -37,10 +37,7 @@ fn read_addr<R: Read>(socket: &mut R) -> io::Result<TargetAddr> {
                 ip, port, 0, 0,
             ))))
         }
-        _ => Err(io::Error::new(
-            io::ErrorKind::Other,
-            "unsupported address type",
-        )),
+        _ => Err(io::Error::other("unsupported address type")),
     }
 }
 
@@ -54,35 +51,15 @@ fn read_response(socket: &mut TcpStream) -> io::Result<TargetAddr> {
 
     match socket.read_u8()? {
         0 => {}
-        1 => {
-            return Err(io::Error::new(
-                io::ErrorKind::Other,
-                "general SOCKS server failure",
-            ))
-        }
-        2 => {
-            return Err(io::Error::new(
-                io::ErrorKind::Other,
-                "connection not allowed by ruleset",
-            ))
-        }
-        3 => return Err(io::Error::new(io::ErrorKind::Other, "network unreachable")),
-        4 => return Err(io::Error::new(io::ErrorKind::Other, "host unreachable")),
-        5 => return Err(io::Error::new(io::ErrorKind::Other, "connection refused")),
-        6 => return Err(io::Error::new(io::ErrorKind::Other, "TTL expired")),
-        7 => {
-            return Err(io::Error::new(
-                io::ErrorKind::Other,
-                "command not supported",
-            ))
-        }
-        8 => {
-            return Err(io::Error::new(
-                io::ErrorKind::Other,
-                "address kind not supported",
-            ))
-        }
-        _ => return Err(io::Error::new(io::ErrorKind::Other, "unknown error")),
+        1 => return Err(io::Error::other("general SOCKS server failure")),
+        2 => return Err(io::Error::other("connection not allowed by ruleset")),
+        3 => return Err(io::Error::other("network unreachable")),
+        4 => return Err(io::Error::other("host unreachable")),
+        5 => return Err(io::Error::other("connection refused")),
+        6 => return Err(io::Error::other("TTL expired")),
+        7 => return Err(io::Error::other("command not supported")),
+        8 => return Err(io::Error::other("address kind not supported")),
+        _ => return Err(io::Error::other("unknown error")),
     }
 
     if socket.read_u8()? != 0 {
@@ -227,14 +204,11 @@ impl Socks5Stream {
         }
 
         if selected_method == 0xff {
-            return Err(io::Error::new(
-                io::ErrorKind::Other,
-                "no acceptable auth methods",
-            ));
+            return Err(io::Error::other("no acceptable auth methods"));
         }
 
         if selected_method != auth.id() && selected_method != Authentication::None.id() {
-            return Err(io::Error::new(io::ErrorKind::Other, "unknown auth method"));
+            return Err(io::Error::other("unknown auth method"));
         }
 
         match *auth {

src/utils.rs

@@ -13,7 +13,7 @@ use bitcoin::Txid;
 /// otherwise.
 ///
 /// [`transaction_get_merkle`]: crate::ElectrumApi::transaction_get_merkle
-/// [`BlockHeader`]: bitcoin::BlockHeader
+/// [`BlockHeader`]: bitcoin::block::Header
 pub fn validate_merkle_proof(
     txid: &Txid,
     merkle_root: &TxMerkleNode,