ChannelKeys - separate commitment revocation from getting the per-commitment point

[rust-lightning] / lightning / src / util / enforcing_trait_impls.rs

diff --git a/lightning/src/util/enforcing_trait_impls.rs b/lightning/src/util/enforcing_trait_impls.rs
index c9c503d9ae5646ff54c50fa07838f0bc99ee9791..c1d3d490262b84d41e08bda7509f6cff8e1b8b69 100644 (file)
--- a/lightning/src/util/enforcing_trait_impls.rs
+++ b/lightning/src/util/enforcing_trait_impls.rs
@@ -6,7 +6,6 @@ use std::cmp;
 use std::sync::{Mutex, Arc};
 
 use bitcoin::blockdata::transaction::Transaction;
-use bitcoin::blockdata::script::Script;
 use bitcoin::util::bip143;
 
 use bitcoin::secp256k1;
@@ -36,31 +35,32 @@ impl EnforcingChannelKeys {
 impl EnforcingChannelKeys {
        fn check_keys<T: secp256k1::Signing + secp256k1::Verification>(&self, secp_ctx: &Secp256k1<T>,
                                                                       keys: &TxCreationKeys) {
-               let revocation_base = PublicKey::from_secret_key(secp_ctx, &self.inner.revocation_base_key());
-               let htlc_base = PublicKey::from_secret_key(secp_ctx, &self.inner.htlc_base_key());
-
                let remote_points = self.inner.remote_channel_pubkeys.as_ref().unwrap();
 
                let keys_expected = TxCreationKeys::new(secp_ctx,
                                                        &keys.per_commitment_point,
                                                        &remote_points.delayed_payment_basepoint,
                                                        &remote_points.htlc_basepoint,
-                                                       &revocation_base,
-                                                       &htlc_base).unwrap();
+                                                       &self.inner.pubkeys().revocation_basepoint,
+                                                       &self.inner.pubkeys().htlc_basepoint).unwrap();
                if keys != &keys_expected { panic!("derived different per-tx keys") }
        }
 }
 
 impl ChannelKeys for EnforcingChannelKeys {
-       fn funding_key(&self) -> &SecretKey { self.inner.funding_key() }
-       fn revocation_base_key(&self) -> &SecretKey { self.inner.revocation_base_key() }
-       fn payment_key(&self) -> &SecretKey { self.inner.payment_key() }
-       fn delayed_payment_base_key(&self) -> &SecretKey { self.inner.delayed_payment_base_key() }
-       fn htlc_base_key(&self) -> &SecretKey { self.inner.htlc_base_key() }
-       fn commitment_seed(&self) -> &[u8; 32] { self.inner.commitment_seed() }
-       fn pubkeys<'a>(&'a self) -> &'a ChannelPublicKeys { self.inner.pubkeys() }
-
-       fn sign_remote_commitment<T: secp256k1::Signing + secp256k1::Verification>(&self, feerate_per_kw: u64, commitment_tx: &Transaction, keys: &TxCreationKeys, htlcs: &[&HTLCOutputInCommitment], to_self_delay: u16, secp_ctx: &Secp256k1<T>) -> Result<(Signature, Vec<Signature>), ()> {
+       fn get_per_commitment_point<T: secp256k1::Signing + secp256k1::Verification>(&self, idx: u64, secp_ctx: &Secp256k1<T>) -> PublicKey {
+               self.inner.get_per_commitment_point(idx, secp_ctx)
+       }
+
+       fn release_commitment_secret(&self, idx: u64) -> [u8; 32] {
+               // TODO: enforce the ChannelKeys contract - error here if we already signed this commitment
+               self.inner.release_commitment_secret(idx)
+       }
+
+       fn pubkeys(&self) -> &ChannelPublicKeys { self.inner.pubkeys() }
+       fn key_derivation_params(&self) -> (u64, u64) { self.inner.key_derivation_params() }
+
+       fn sign_remote_commitment<T: secp256k1::Signing + secp256k1::Verification>(&self, feerate_per_kw: u32, commitment_tx: &Transaction, keys: &TxCreationKeys, htlcs: &[&HTLCOutputInCommitment], to_self_delay: u16, secp_ctx: &Secp256k1<T>) -> Result<(Signature, Vec<Signature>), ()> {
                if commitment_tx.input.len() != 1 { panic!("lightning commitment transactions have a single input"); }
                self.check_keys(secp_ctx, keys);
                let obscured_commitment_transaction_number = (commitment_tx.lock_time & 0xffffff) as u64 | ((commitment_tx.input[0].sequence as u64 & 0xffffff) << 3*8);
@@ -79,6 +79,8 @@ impl ChannelKeys for EnforcingChannelKeys {
        }
 
        fn sign_local_commitment<T: secp256k1::Signing + secp256k1::Verification>(&self, local_commitment_tx: &LocalCommitmentTransaction, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
+               // TODO: enforce the ChannelKeys contract - error if this commitment was already revoked
+               // TODO: need the commitment number
                Ok(self.inner.sign_local_commitment(local_commitment_tx, secp_ctx).unwrap())
        }
 
@@ -104,8 +106,12 @@ impl ChannelKeys for EnforcingChannelKeys {
                Ok(self.inner.sign_local_commitment_htlc_transactions(local_commitment_tx, local_csv, secp_ctx).unwrap())
        }
 
-       fn sign_justice_transaction<T: secp256k1::Signing>(&self, justice_tx: &Transaction, input: usize, witness_script: &Script, amount: u64, per_commitment_key: &SecretKey, revocation_pubkey: &PublicKey, is_htlc: bool, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
-               Ok(self.inner.sign_justice_transaction(justice_tx, input, witness_script, amount, per_commitment_key, revocation_pubkey, is_htlc, secp_ctx).unwrap())
+       fn sign_justice_transaction<T: secp256k1::Signing + secp256k1::Verification>(&self, justice_tx: &Transaction, input: usize, amount: u64, per_commitment_key: &SecretKey, htlc: &Option<HTLCOutputInCommitment>, on_remote_tx_csv: u16, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
+               Ok(self.inner.sign_justice_transaction(justice_tx, input, amount, per_commitment_key, htlc, on_remote_tx_csv, secp_ctx).unwrap())
+       }
+
+       fn sign_remote_htlc_transaction<T: secp256k1::Signing + secp256k1::Verification>(&self, htlc_tx: &Transaction, input: usize, amount: u64, per_commitment_point: &PublicKey, htlc: &HTLCOutputInCommitment, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
+               Ok(self.inner.sign_remote_htlc_transaction(htlc_tx, input, amount, per_commitment_point, htlc, secp_ctx).unwrap())
        }
 
        fn sign_closing_transaction<T: secp256k1::Signing>(&self, closing_tx: &Transaction, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {