Pass channel params to sign_justice_revoked_htlc

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/package.rs

@@ -620,7 +620,7 @@ impl PackageSolvingData {
 				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_htlc_redeemscript_with_explicit_keys(&outp.htlc, &onchain_handler.channel_type_features(), &chan_keys.broadcaster_htlc_key, &chan_keys.countersignatory_htlc_key, &chan_keys.revocation_key);
 				//TODO: should we panic on signer failure ?
-				if let Ok(sig) = onchain_handler.signer.sign_justice_revoked_htlc(&bumped_tx, i, outp.amount, &outp.per_commitment_key, &outp.htlc, &onchain_handler.secp_ctx) {
+				if let Ok(sig) = onchain_handler.signer.sign_justice_revoked_htlc(channel_parameters, &bumped_tx, i, outp.amount, &outp.per_commitment_key, &outp.htlc, &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

@@ -143,8 +143,9 @@ 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_htlc(
-		&self, justice_tx: &Transaction, input: usize, amount: u64, per_commitment_key: &SecretKey,
-		htlc: &HTLCOutputInCommitment, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, justice_tx: &Transaction,
+		input: usize, amount: u64, per_commitment_key: &SecretKey, htlc: &HTLCOutputInCommitment,
+		secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()>;
 	/// Computes the signature for a commitment transaction's HTLC output used as an input within
 	/// `htlc_tx`, which spends the commitment transaction at index `input`. The signature returned

lightning/src/sign/mod.rs

@@ -1537,8 +1537,9 @@ impl EcdsaChannelSigner for InMemorySigner {
 	}
 
 	fn sign_justice_revoked_htlc(
-		&self, justice_tx: &Transaction, input: usize, amount: u64, per_commitment_key: &SecretKey,
-		htlc: &HTLCOutputInCommitment, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, justice_tx: &Transaction,
+		input: usize, amount: u64, per_commitment_key: &SecretKey, htlc: &HTLCOutputInCommitment,
+		secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		let revocation_key = chan_utils::derive_private_revocation_key(
 			&secp_ctx,
@@ -1548,25 +1549,25 @@ 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 counterparty_keys =
+				channel_parameters.counterparty_pubkeys().expect(MISSING_PARAMS_ERR);
 			let counterparty_htlcpubkey = HtlcKey::from_basepoint(
 				&secp_ctx,
 				&counterparty_keys.htlc_basepoint,
 				&per_commitment_point,
 			);
 			let holder_htlcpubkey = HtlcKey::from_basepoint(
 				&secp_ctx,
-				&self.pubkeys().htlc_basepoint,
+				&channel_parameters.holder_pubkeys.htlc_basepoint,
 				&per_commitment_point,
 			);
-			let chan_type = self.channel_type_features().expect(MISSING_PARAMS_ERR);
 			chan_utils::get_htlc_redeemscript_with_explicit_keys(
 				&htlc,
-				chan_type,
+				&channel_parameters.channel_type_features,
 				&counterparty_htlcpubkey,
 				&holder_htlcpubkey,
 				&revocation_pubkey,

lightning/src/util/test_channel_signer.rs

@@ -332,15 +332,17 @@ impl EcdsaChannelSigner for TestChannelSigner {
 	}
 
 	fn sign_justice_revoked_htlc(
-		&self, justice_tx: &Transaction, input: usize, amount: u64, per_commitment_key: &SecretKey,
-		htlc: &HTLCOutputInCommitment, secp_ctx: &Secp256k1<secp256k1::All>,
+		&self, channel_parameters: &ChannelTransactionParameters, justice_tx: &Transaction,
+		input: usize, amount: u64, per_commitment_key: &SecretKey, htlc: &HTLCOutputInCommitment,
+		secp_ctx: &Secp256k1<secp256k1::All>,
 	) -> Result<Signature, ()> {
 		#[cfg(test)]
 		if !self.is_signer_available(SignerOp::SignJusticeRevokedHtlc) {
 			return Err(());
 		}
 		Ok(EcdsaChannelSigner::sign_justice_revoked_htlc(
 			&self.inner,
+			channel_parameters,
 			justice_tx,
 			input,
 			amount,