Pass channel params to sign_channel_announcement_with_funding_key

Now that channel_value_satoshis has been moved to
ChannelTransactionParameters, pass the entire parameters when calling
each method on EcdsaChannelSigner. This will remove the need for
ChannelSigner::provide_channel_parameters. Instead, the parameters from
the FundingScope will be passed in to each method. This simplifies the
interaction with a ChannelSigner when needing to be called for more than
one FundingScope, which will be the case for pending splices and RBF
attempts.

Author: jkczyz

lightning/src/ln/channel.rs

@@ -8004,7 +8004,8 @@ impl<SP: Deref> FundedChannel<SP> where
 		};
 		match &self.context.holder_signer {
 			ChannelSignerType::Ecdsa(ecdsa) => {
-				let our_bitcoin_sig = match ecdsa.sign_channel_announcement_with_funding_key(&announcement, &self.context.secp_ctx) {
+				let channel_parameters = &self.funding.channel_transaction_parameters;
+				let our_bitcoin_sig = match ecdsa.sign_channel_announcement_with_funding_key(channel_parameters, &announcement, &self.context.secp_ctx) {
 					Err(_) => {
 						log_error!(logger, "Signer rejected channel_announcement signing. Channel will not be announced!");
 						return None;
@@ -8045,7 +8046,8 @@ impl<SP: Deref> FundedChannel<SP> where
 				.map_err(|_| ChannelError::Ignore("Failed to generate node signature for channel_announcement".to_owned()))?;
 			match &self.context.holder_signer {
 				ChannelSignerType::Ecdsa(ecdsa) => {
-					let our_bitcoin_sig = ecdsa.sign_channel_announcement_with_funding_key(&announcement, &self.context.secp_ctx)
+					let channel_parameters = &self.funding.channel_transaction_parameters;
+					let our_bitcoin_sig = ecdsa.sign_channel_announcement_with_funding_key(channel_parameters, &announcement, &self.context.secp_ctx)
 						.map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
 					Ok(msgs::ChannelAnnouncement {
 						node_signature_1: if were_node_one { our_node_sig } else { their_node_sig },

lightning/src/sign/ecdsa.rs

@@ -238,7 +238,8 @@ pub trait EcdsaChannelSigner: ChannelSigner {
 	///
 	/// [`NodeSigner::sign_gossip_message`]: crate::sign::NodeSigner::sign_gossip_message
 	fn sign_channel_announcement_with_funding_key(
-		&self, msg: &UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters,
+		msg: &UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()>;
 
 	/// Signs the input of a splicing funding transaction with our funding key.

lightning/src/sign/mod.rs

@@ -1696,7 +1696,8 @@ impl EcdsaChannelSigner for InMemorySigner {
 	}
 
 	fn sign_channel_announcement_with_funding_key(
-		&self, msg: &UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, _channel_parameters: &ChannelTransactionParameters,
+		msg: &UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		let msghash = hash_to_message!(&Sha256dHash::hash(&msg.encode()[..])[..]);
 		Ok(secp_ctx.sign_ecdsa(&msghash, &self.funding_key))

lightning/src/util/test_channel_signer.rs

@@ -474,9 +474,10 @@ impl EcdsaChannelSigner for TestChannelSigner {
 	}
 
 	fn sign_channel_announcement_with_funding_key(
-		&self, msg: &msgs::UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters,
+		msg: &msgs::UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
-		self.inner.sign_channel_announcement_with_funding_key(msg, secp_ctx)
+		self.inner.sign_channel_announcement_with_funding_key(channel_parameters, msg, secp_ctx)
 	}
 
 	fn sign_splicing_funding_input(