Pass channel params to sign_splicing_funding_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/sign/ecdsa.rs

@@ -255,7 +255,7 @@ pub trait EcdsaChannelSigner: ChannelSigner {
 	/// This method is *not* asynchronous. If an `Err` is returned, the channel will be immediately
 	/// closed.
 	fn sign_splicing_funding_input(
-		&self, tx: &Transaction, input_index: usize, input_value: u64,
-		secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, tx: &Transaction,
+		input_index: usize, input_value: u64, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()>;
 }

lightning/src/sign/mod.rs

@@ -1705,12 +1705,12 @@ impl EcdsaChannelSigner for InMemorySigner {
 	}
 
 	fn sign_splicing_funding_input(
-		&self, tx: &Transaction, input_index: usize, input_value: u64,
-		secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, tx: &Transaction,
+		input_index: usize, input_value: u64, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		let funding_pubkey = PublicKey::from_secret_key(secp_ctx, &self.funding_key);
 		let counterparty_funding_key =
-			&self.counterparty_pubkeys().expect(MISSING_PARAMS_ERR).funding_pubkey;
+			&channel_parameters.counterparty_pubkeys().expect(MISSING_PARAMS_ERR).funding_pubkey;
 		let funding_redeemscript =
 			make_funding_redeemscript(&funding_pubkey, counterparty_funding_key);
 		let sighash = &sighash::SighashCache::new(tx)

lightning/src/util/test_channel_signer.rs

@@ -481,10 +481,16 @@ impl EcdsaChannelSigner for TestChannelSigner {
 	}
 
 	fn sign_splicing_funding_input(
-		&self, tx: &Transaction, input_index: usize, input_value: u64,
-		secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, tx: &Transaction,
+		input_index: usize, input_value: u64, secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
-		self.inner.sign_splicing_funding_input(tx, input_index, input_value, secp_ctx)
+		self.inner.sign_splicing_funding_input(
+			channel_parameters,
+			tx,
+			input_index,
+			input_value,
+			secp_ctx,
+		)
 	}
 }