Pass channel params to sign_justice_revoked_output

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/chain/channelmonitor.rs

@@ -3511,8 +3511,11 @@ impl<Signer: EcdsaChannelSigner> ChannelMonitorImpl<Signer> {
 		let revokeable_redeemscript = chan_utils::get_revokeable_redeemscript(&revocation_pubkey,
 			self.counterparty_commitment_params.on_counterparty_tx_csv, &delayed_key);
 
+		let channel_parameters = &self.onchain_tx_handler.channel_transaction_parameters;
 		let sig = self.onchain_tx_handler.signer.sign_justice_revoked_output(
-			&justice_tx, input_idx, value, &per_commitment_key, &self.onchain_tx_handler.secp_ctx)?;
+			&channel_parameters, &justice_tx, input_idx, value, &per_commitment_key,
+			&self.onchain_tx_handler.secp_ctx,
+		)?;
 		justice_tx.input[input_idx].witness.push_ecdsa_signature(&BitcoinSignature::sighash_all(sig));
 		justice_tx.input[input_idx].witness.push(&[1u8]);
 		justice_tx.input[input_idx].witness.push(revokeable_redeemscript.as_bytes());

lightning/src/chain/package.rs

@@ -602,12 +602,13 @@ impl PackageSolvingData {
 		}
 	}
 	fn finalize_input<Signer: EcdsaChannelSigner>(&self, bumped_tx: &mut Transaction, i: usize, onchain_handler: &mut OnchainTxHandler<Signer>) -> bool {
+		let channel_parameters = &onchain_handler.channel_transaction_parameters;
 		match self {
 			PackageSolvingData::RevokedOutput(ref outp) => {
 				let chan_keys = TxCreationKeys::derive_new(&onchain_handler.secp_ctx, &outp.per_commitment_point, &outp.counterparty_delayed_payment_base_key, &outp.counterparty_htlc_base_key, &onchain_handler.signer.pubkeys().revocation_basepoint, &onchain_handler.signer.pubkeys().htlc_basepoint);
 				let witness_script = chan_utils::get_revokeable_redeemscript(&chan_keys.revocation_key, outp.on_counterparty_tx_csv, &chan_keys.broadcaster_delayed_payment_key);
 				//TODO: should we panic on signer failure ?
-				if let Ok(sig) = onchain_handler.signer.sign_justice_revoked_output(&bumped_tx, i, outp.amount.to_sat(), &outp.per_commitment_key, &onchain_handler.secp_ctx) {
+				if let Ok(sig) = onchain_handler.signer.sign_justice_revoked_output(channel_parameters, &bumped_tx, i, outp.amount.to_sat(), &outp.per_commitment_key, &onchain_handler.secp_ctx) {
 					let mut ser_sig = sig.serialize_der().to_vec();
 					ser_sig.push(EcdsaSighashType::All as u8);
 					bumped_tx.input[i].witness.push(ser_sig);

lightning/src/sign/ecdsa.rs

@@ -112,7 +112,8 @@ pub trait EcdsaChannelSigner: ChannelSigner {
 	/// [`ChannelMonitor::signer_unblocked`]: crate::chain::channelmonitor::ChannelMonitor::signer_unblocked
 	/// [`ChainMonitor::signer_unblocked`]: crate::chain::chainmonitor::ChainMonitor::signer_unblocked
 	fn sign_justice_revoked_output(
-		&self, justice_tx: &Transaction, input: usize, amount: u64, per_commitment_key: &SecretKey,
+		&self, channel_parameters: &ChannelTransactionParameters, justice_tx: &Transaction,
+		input: usize, amount: u64, per_commitment_key: &SecretKey,
 		secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()>;
 	/// Create a signature for the given input in a transaction spending a commitment transaction

lightning/src/sign/mod.rs

@@ -1509,7 +1509,8 @@ impl EcdsaChannelSigner for InMemorySigner {
 	}
 
 	fn sign_justice_revoked_output(
-		&self, justice_tx: &Transaction, input: usize, amount: u64, per_commitment_key: &SecretKey,
+		&self, channel_parameters: &ChannelTransactionParameters, justice_tx: &Transaction,
+		input: usize, amount: u64, per_commitment_key: &SecretKey,
 		secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		let revocation_key = chan_utils::derive_private_revocation_key(
@@ -1520,13 +1521,13 @@ impl EcdsaChannelSigner for InMemorySigner {
 		let per_commitment_point = PublicKey::from_secret_key(secp_ctx, &per_commitment_key);
 		let revocation_pubkey = RevocationKey::from_basepoint(
 			&secp_ctx,
-			&self.pubkeys().revocation_basepoint,
+			&channel_parameters.holder_pubkeys.revocation_basepoint,
 			&per_commitment_point,
 		);
 		let witness_script = {
-			let counterparty_keys = self.counterparty_pubkeys().expect(MISSING_PARAMS_ERR);
-			let holder_selected_contest_delay =
-				self.holder_selected_contest_delay().expect(MISSING_PARAMS_ERR);
+			let counterparty_keys =
+				channel_parameters.counterparty_pubkeys().expect(MISSING_PARAMS_ERR);
+			let holder_selected_contest_delay = channel_parameters.holder_selected_contest_delay;
 			let counterparty_delayedpubkey = DelayedPaymentKey::from_basepoint(
 				&secp_ctx,
 				&counterparty_keys.delayed_payment_basepoint,

lightning/src/util/test_channel_signer.rs

@@ -313,7 +313,8 @@ impl EcdsaChannelSigner for TestChannelSigner {
 	}
 
 	fn sign_justice_revoked_output(
-		&self, justice_tx: &Transaction, input: usize, amount: u64, per_commitment_key: &SecretKey,
+		&self, channel_parameters: &ChannelTransactionParameters, justice_tx: &Transaction,
+		input: usize, amount: u64, per_commitment_key: &SecretKey,
 		secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		#[cfg(test)]
@@ -322,6 +323,7 @@ impl EcdsaChannelSigner for TestChannelSigner {
 		}
 		Ok(EcdsaChannelSigner::sign_justice_revoked_output(
 			&self.inner,
+			channel_parameters,
 			justice_tx,
 			input,
 			amount,