From: Matt Corallo <git@bluematt.me>
Date: Sat, 24 Dec 2022 04:16:48 +0000 (+0000)
Subject: Use an explicit `Sign` type on the `ChannelMonitor` read tuple
X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=24d99fdf1e7d48f8678025696953a34fdd6c48d5;p=rust-lightning

Use an explicit `Sign` type on the `ChannelMonitor` read tuple

The bindings currently get confused by the implicit `Sign` type, so
we temporarily remove it on the `impl` here.
---

diff --git a/lightning-persister/src/lib.rs b/lightning-persister/src/lib.rs
index 670a7369d..14093d16a 100644
--- a/lightning-persister/src/lib.rs
+++ b/lightning-persister/src/lib.rs
@@ -19,7 +19,7 @@ extern crate libc;
 use bitcoin::hash_types::{BlockHash, Txid};
 use bitcoin::hashes::hex::FromHex;
 use lightning::chain::channelmonitor::ChannelMonitor;
-use lightning::sign::{EntropySource, SignerProvider};
+use lightning::sign::{EntropySource, SignerProvider, WriteableEcdsaChannelSigner};
 use lightning::util::ser::{ReadableArgs, Writeable};
 use lightning::util::persist::KVStorePersister;
 use std::fs;
@@ -58,12 +58,11 @@ impl FilesystemPersister {
 	}
 
 	/// Read `ChannelMonitor`s from disk.
-	pub fn read_channelmonitors<ES: Deref, SP: Deref> (
-		&self, entropy_source: ES, signer_provider: SP
-	) -> std::io::Result<Vec<(BlockHash, ChannelMonitor<<SP::Target as SignerProvider>::Signer>)>>
+	pub fn read_channelmonitors<ES: Deref, WES: WriteableEcdsaChannelSigner, SP: SignerProvider<Signer = WES> + Sized, SPD: Deref<Target=SP>> (
+		&self, entropy_source: ES, signer_provider: SPD
+	) -> Result<Vec<(BlockHash, ChannelMonitor<WES>)>, std::io::Error>
 		where
 			ES::Target: EntropySource + Sized,
-			SP::Target: SignerProvider + Sized
 	{
 		let mut path = PathBuf::from(&self.path_to_channel_data);
 		path.push("monitors");
@@ -104,7 +103,7 @@ impl FilesystemPersister {
 
 			let contents = fs::read(&file.path())?;
 			let mut buffer = Cursor::new(&contents);
-			match <(BlockHash, ChannelMonitor<<SP::Target as SignerProvider>::Signer>)>::read(&mut buffer, (&*entropy_source, &*signer_provider)) {
+			match <(BlockHash, ChannelMonitor<WES>)>::read(&mut buffer, (&*entropy_source, &*signer_provider)) {
 				Ok((blockhash, channel_monitor)) => {
 					if channel_monitor.get_funding_txo().0.txid != txid || channel_monitor.get_funding_txo().0.index != index {
 						return Err(std::io::Error::new(std::io::ErrorKind::InvalidData,
diff --git a/lightning/src/chain/channelmonitor.rs b/lightning/src/chain/channelmonitor.rs
index f98c0bcac..2e4862f68 100644
--- a/lightning/src/chain/channelmonitor.rs
+++ b/lightning/src/chain/channelmonitor.rs
@@ -3900,8 +3900,8 @@ where
 
 const MAX_ALLOC_SIZE: usize = 64*1024;
 
-impl<'a, 'b, ES: EntropySource, SP: SignerProvider> ReadableArgs<(&'a ES, &'b SP)>
-		for (BlockHash, ChannelMonitor<SP::Signer>) {
+impl<'a, 'b, ES: EntropySource, SP: SignerProvider<Signer=Signer>, Signer: WriteableEcdsaChannelSigner> ReadableArgs<(&'a ES, &'b SP)>
+		for (BlockHash, ChannelMonitor<Signer>) {
 	fn read<R: io::Read>(reader: &mut R, args: (&'a ES, &'b SP)) -> Result<Self, DecodeError> {
 		macro_rules! unwrap_obj {
 			($key: expr) => {