-use ln::chan_utils::{HTLCOutputInCommitment, TxCreationKeys};
+use ln::chan_utils::{HTLCOutputInCommitment, TxCreationKeys, ChannelPublicKeys};
use ln::msgs;
use chain::keysinterface::{ChannelKeys, InMemoryChannelKeys};
use std::sync::Mutex;
use bitcoin::blockdata::transaction::Transaction;
-use bitcoin::blockdata::script::Script;
use secp256k1;
use secp256k1::key::{SecretKey, PublicKey};
}
}
}
+
+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 payment_base = PublicKey::from_secret_key(secp_ctx, &self.inner.payment_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,
+ &payment_base,
+ &htlc_base).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 htlc_base_key(&self) -> &SecretKey { self.inner.htlc_base_key() }
fn commitment_seed(&self) -> &[u8; 32] { self.inner.commitment_seed() }
- fn sign_remote_commitment<T: secp256k1::Signing>(&self, channel_value_satoshis: u64, feerate_per_kw: u64, 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!(); }
+ 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>), ()> {
+ 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);
{
commitment_data.1 = cmp::max(commitment_number, commitment_data.1)
}
- Ok(self.inner.sign_remote_commitment(channel_value_satoshis, feerate_per_kw, commitment_tx, keys, htlcs, to_self_delay, secp_ctx).unwrap())
+ Ok(self.inner.sign_remote_commitment(feerate_per_kw, commitment_tx, keys, htlcs, to_self_delay, secp_ctx).unwrap())
}
- fn sign_closing_transaction<T: secp256k1::Signing>(&self, channel_value_satoshis: u64, channel_funding_redeemscript: &Script, closing_tx: &Transaction, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
- Ok(self.inner.sign_closing_transaction(channel_value_satoshis, channel_funding_redeemscript, closing_tx, secp_ctx).unwrap())
+ fn sign_closing_transaction<T: secp256k1::Signing>(&self, closing_tx: &Transaction, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
+ Ok(self.inner.sign_closing_transaction(closing_tx, secp_ctx).unwrap())
}
fn sign_channel_announcement<T: secp256k1::Signing>(&self, msg: &msgs::UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
self.inner.sign_channel_announcement(msg, secp_ctx)
}
- fn set_remote_funding_pubkey(&mut self, key: &PublicKey) {
- self.inner.set_remote_funding_pubkey(key)
+ fn set_remote_channel_pubkeys(&mut self, channel_pubkeys: &ChannelPublicKeys) {
+ self.inner.set_remote_channel_pubkeys(channel_pubkeys)
}
}
+
impl_writeable!(EnforcingChannelKeys, 0, {
inner,
commitment_number_obscure_and_last