Pass channel params to sign_holder_anchor_input

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/events/bump_transaction.rs

@@ -690,7 +690,8 @@ where
 			anchor_tx = self.utxo_source.sign_psbt(anchor_psbt)?;
 
 			let signer = anchor_descriptor.derive_channel_signer(&self.signer_provider);
-			let anchor_sig = signer.sign_holder_anchor_input(&anchor_tx, 0, &self.secp)?;
+			let channel_parameters = &anchor_descriptor.channel_derivation_parameters.transaction_parameters;
+			let anchor_sig = signer.sign_holder_anchor_input(channel_parameters, &anchor_tx, 0, &self.secp)?;
 			anchor_tx.input[0].witness = anchor_descriptor.tx_input_witness(&anchor_sig);
 
 			#[cfg(debug_assertions)] {

lightning/src/sign/ecdsa.rs

@@ -223,7 +223,8 @@ pub trait EcdsaChannelSigner: ChannelSigner {
 	/// [`ChannelMonitor::signer_unblocked`]: crate::chain::channelmonitor::ChannelMonitor::signer_unblocked
 	/// [`ChainMonitor::signer_unblocked`]: crate::chain::chainmonitor::ChainMonitor::signer_unblocked
 	fn sign_holder_anchor_input(
-		&self, anchor_tx: &Transaction, input: usize, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, anchor_tx: &Transaction,
+		input: usize, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()>;
 	/// Signs a channel announcement message with our funding key proving it comes from one of the
 	/// channel participants.

lightning/src/sign/mod.rs

@@ -1662,10 +1662,11 @@ impl EcdsaChannelSigner for InMemorySigner {
 	}
 
 	fn sign_holder_anchor_input(
-		&self, anchor_tx: &Transaction, input: usize, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, anchor_tx: &Transaction,
+		input: usize, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		let witness_script =
-			chan_utils::get_anchor_redeemscript(&self.holder_channel_pubkeys.funding_pubkey);
+			chan_utils::get_anchor_redeemscript(&channel_parameters.holder_pubkeys.funding_pubkey);
 		let sighash = sighash::SighashCache::new(&*anchor_tx)
 			.p2wsh_signature_hash(
 				input,

lightning/src/util/test_channel_signer.rs

@@ -448,7 +448,8 @@ impl EcdsaChannelSigner for TestChannelSigner {
 	}
 
 	fn sign_holder_anchor_input(
-		&self, anchor_tx: &Transaction, input: usize, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, anchor_tx: &Transaction,
+		input: usize, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		debug_assert!(MIN_CHAN_DUST_LIMIT_SATOSHIS > ANCHOR_OUTPUT_VALUE_SATOSHI);
 		// As long as our minimum dust limit is enforced and is greater than our anchor output
@@ -461,7 +462,13 @@ impl EcdsaChannelSigner for TestChannelSigner {
 		if !self.is_signer_available(SignerOp::SignHolderAnchorInput) {
 			return Err(());
 		}
-		EcdsaChannelSigner::sign_holder_anchor_input(&self.inner, anchor_tx, input, secp_ctx)
+		EcdsaChannelSigner::sign_holder_anchor_input(
+			&self.inner,
+			channel_parameters,
+			anchor_tx,
+			input,
+			secp_ctx,
+		)
 	}
 
 	fn sign_channel_announcement_with_funding_key(