Update docs regarding payment path privacy

[rust-lightning] / lightning / src / ln / chan_utils.rs

diff --git a/lightning/src/ln/chan_utils.rs b/lightning/src/ln/chan_utils.rs
index 729425d70d5bd705bfe65e345567794c8381e64e..cd9f261b2283b40fb2efd5db45ef4a0fa2f255b7 100644 (file)
--- a/lightning/src/ln/chan_utils.rs
+++ b/lightning/src/ln/chan_utils.rs
@@ -739,17 +739,12 @@ pub fn build_htlc_input_witness(
        } else {
                EcdsaSighashType::All
        };
-       let mut remote_sig = remote_sig.serialize_der().to_vec();
-       remote_sig.push(remote_sighash_type as u8);
-
-       let mut local_sig = local_sig.serialize_der().to_vec();
-       local_sig.push(EcdsaSighashType::All as u8);
 
        let mut witness = Witness::new();
        // First push the multisig dummy, note that due to BIP147 (NULLDUMMY) it must be a zero-length element.
        witness.push(vec![]);
-       witness.push(remote_sig);
-       witness.push(local_sig);
+       witness.push_bitcoin_signature(&remote_sig.serialize_der(), remote_sighash_type);
+       witness.push_bitcoin_signature(&local_sig.serialize_der(), EcdsaSighashType::All);
        if let Some(preimage) = preimage {
                witness.push(preimage.0.to_vec());
        } else {
@@ -801,9 +796,10 @@ pub(crate) fn get_anchor_output<'a>(commitment_tx: &'a Transaction, funding_pubk
 /// Returns the witness required to satisfy and spend an anchor input.
 pub fn build_anchor_input_witness(funding_key: &PublicKey, funding_sig: &Signature) -> Witness {
        let anchor_redeem_script = chan_utils::get_anchor_redeemscript(funding_key);
-       let mut funding_sig = funding_sig.serialize_der().to_vec();
-       funding_sig.push(EcdsaSighashType::All as u8);
-       Witness::from_vec(vec![funding_sig, anchor_redeem_script.to_bytes()])
+       let mut ret = Witness::new();
+       ret.push_bitcoin_signature(&funding_sig.serialize_der(), EcdsaSighashType::All);
+       ret.push(anchor_redeem_script.as_bytes());
+       ret
 }
 
 /// Per-channel data used to build transactions in conjunction with the per-commitment data (CommitmentTransaction).
@@ -1037,17 +1033,13 @@ impl HolderCommitmentTransaction {
                // First push the multisig dummy, note that due to BIP147 (NULLDUMMY) it must be a zero-length element.
                let mut tx = self.inner.built.transaction.clone();
                tx.input[0].witness.push(Vec::new());
-               let mut ser_holder_sig = holder_sig.serialize_der().to_vec();
-               ser_holder_sig.push(EcdsaSighashType::All as u8);
-               let mut ser_cp_sig = self.counterparty_sig.serialize_der().to_vec();
-               ser_cp_sig.push(EcdsaSighashType::All as u8);
 
                if self.holder_sig_first {
-                       tx.input[0].witness.push(ser_holder_sig);
-                       tx.input[0].witness.push(ser_cp_sig);
+                       tx.input[0].witness.push_bitcoin_signature(&holder_sig.serialize_der(), EcdsaSighashType::All);
+                       tx.input[0].witness.push_bitcoin_signature(&self.counterparty_sig.serialize_der(), EcdsaSighashType::All);
                } else {
-                       tx.input[0].witness.push(ser_cp_sig);
-                       tx.input[0].witness.push(ser_holder_sig);
+                       tx.input[0].witness.push_bitcoin_signature(&self.counterparty_sig.serialize_der(), EcdsaSighashType::All);
+                       tx.input[0].witness.push_bitcoin_signature(&holder_sig.serialize_der(), EcdsaSighashType::All);
                }
 
                tx.input[0].witness.push(funding_redeemscript.as_bytes().to_vec());
@@ -1643,7 +1635,7 @@ mod tests {
        use crate::ln::chan_utils::{get_htlc_redeemscript, get_to_countersignatory_with_anchors_redeemscript, CommitmentTransaction, TxCreationKeys, ChannelTransactionParameters, CounterpartyChannelTransactionParameters, HTLCOutputInCommitment};
        use bitcoin::secp256k1::{PublicKey, SecretKey, Secp256k1};
        use crate::util::test_utils;
-       use crate::chain::keysinterface::{KeysInterface, BaseSign};
+       use crate::chain::keysinterface::{BaseSign, SignerProvider};
        use bitcoin::{Network, Txid};
        use bitcoin::hashes::Hash;
        use crate::ln::PaymentHash;