use ln::chan_utils;
use ln::chan_utils::{TxCreationKeys, HTLCOutputInCommitment, make_funding_redeemscript, ChannelPublicKeys, LocalCommitmentTransaction};
use ln::msgs;
+use ln::channelmanager::PaymentPreimage;
use std::sync::Arc;
use std::sync::atomic::{AtomicUsize, Ordering};
//TODO: dry-up witness_script and pass pubkeys
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, ()>;
+ /// Create a signature for a claiming transaction for a HTLC output on a remote commitment
+ /// transaction, either offered or received.
+ ///
+ /// HTLC transaction may claim multiples offered outputs at same time if we know preimage
+ /// for each at detection. It may be called multtiples time for same output(s) if a fee-bump
+ /// is needed with regards to an upcoming timelock expiration.
+ ///
+ /// Witness_script is either a offered or received script as defined in BOLT3 for HTLC
+ /// outputs.
+ ///
+ /// Input index is a pointer towards outpoint spent, commited by sigs (BIP 143).
+ ///
+ /// Amount is value of the output spent by this input, committed by sigs (BIP 143).
+ ///
+ /// Preimage is solution for an offered HTLC haslock. A preimage sets to None hints this
+ /// htlc_tx as timing-out funds back to us on a received output.
+ //TODO: dry-up witness_script and pass pubkeys
+ fn sign_remote_htlc_transaction<T: secp256k1::Signing>(&self, htlc_tx: &Transaction, input: usize, witness_script: &Script, amount: u64, per_commitment_point: &PublicKey, preimage: &Option<PaymentPreimage>, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()>;
+
/// Create a signature for a (proposed) closing transaction.
///
/// Note that, due to rounding, there may be one "missing" satoshi, and either party may have
Err(())
}
+ fn sign_remote_htlc_transaction<T: secp256k1::Signing>(&self, htlc_tx: &Transaction, input: usize, witness_script: &Script, amount: u64, per_commitment_point: &PublicKey, preimage: &Option<PaymentPreimage>, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
+ if let Ok(htlc_key) = chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &self.htlc_base_key) {
+ let sighash_parts = bip143::SighashComponents::new(&htlc_tx);
+ let sighash = hash_to_message!(&sighash_parts.sighash_all(&htlc_tx.input[input], &witness_script, amount)[..]);
+ return Ok(secp_ctx.sign(&sighash, &htlc_key))
+ }
+ Err(())
+ }
+
fn sign_closing_transaction<T: secp256k1::Signing>(&self, closing_tx: &Transaction, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
if closing_tx.input.len() != 1 { return Err(()); }
if closing_tx.input[0].witness.len() != 0 { return Err(()); }
},
RemoteHTLC {
per_commitment_point: PublicKey,
- key: SecretKey,
preimage: Option<PaymentPreimage>,
amount: u64,
locktime: u32,
input_descriptor.write(writer)?;
writer.write_all(&byte_utils::be64_to_array(*amount))?;
},
- &InputMaterial::RemoteHTLC { ref per_commitment_point, ref key, ref preimage, ref amount, ref locktime } => {
+ &InputMaterial::RemoteHTLC { ref per_commitment_point, ref preimage, ref amount, ref locktime } => {
writer.write_all(&[1; 1])?;
per_commitment_point.write(writer)?;
- key.write(writer)?;
preimage.write(writer)?;
writer.write_all(&byte_utils::be64_to_array(*amount))?;
writer.write_all(&byte_utils::be32_to_array(*locktime))?;
},
1 => {
let per_commitment_point = Readable::read(reader)?;
- let key = Readable::read(reader)?;
let preimage = Readable::read(reader)?;
let amount = Readable::read(reader)?;
let locktime = Readable::read(reader)?;
InputMaterial::RemoteHTLC {
per_commitment_point,
- key,
preimage,
amount,
locktime
if revocation_points.0 == commitment_number + 1 { Some(point) } else { None }
} else { None };
if let Some(revocation_point) = revocation_point_option {
- let htlc_privkey = ignore_error!(chan_utils::derive_private_key(&self.secp_ctx, revocation_point, &self.keys.htlc_base_key()));
-
self.remote_payment_script = {
// Note that the Network here is ignored as we immediately drop the address for the
// script_pubkey version
let preimage = if htlc.offered { if let Some(p) = self.payment_preimages.get(&htlc.payment_hash) { Some(*p) } else { None } } else { None };
let aggregable = if !htlc.offered { false } else { true };
if preimage.is_some() || !htlc.offered {
- let witness_data = InputMaterial::RemoteHTLC { per_commitment_point: *revocation_point, key: htlc_privkey, preimage, amount: htlc.amount_msat / 1000, locktime: htlc.cltv_expiry };
+ let witness_data = InputMaterial::RemoteHTLC { per_commitment_point: *revocation_point, preimage, amount: htlc.amount_msat / 1000, locktime: htlc.cltv_expiry };
claimable_outpoints.push(ClaimRequest { absolute_timelock: htlc.cltv_expiry, aggregable, outpoint: BitcoinOutPoint { txid: commitment_txid, vout: transaction_output_index }, witness_data });
}
}
use bitcoin::blockdata::transaction::{Transaction, TxIn, TxOut, SigHashType};
use bitcoin::blockdata::transaction::OutPoint as BitcoinOutPoint;
use bitcoin::blockdata::script::Script;
-use bitcoin::util::bip143;
use bitcoin::hash_types::Txid;
log_trace!(self, "Going to broadcast Penalty Transaction {} claiming revoked {} output {} from {} with new feerate {}...", bumped_tx.txid(), if *input_descriptor == InputDescriptors::RevokedOutput { "to_local" } else if *input_descriptor == InputDescriptors::RevokedOfferedHTLC { "offered" } else if *input_descriptor == InputDescriptors::RevokedReceivedHTLC { "received" } else { "" }, outp.vout, outp.txid, new_feerate);
}
},
- &InputMaterial::RemoteHTLC { ref per_commitment_point, ref key, ref preimage, ref amount, ref locktime } => {
+ &InputMaterial::RemoteHTLC { ref per_commitment_point, ref preimage, ref amount, ref locktime } => {
if let Ok(chan_keys) = TxCreationKeys::new(&self.secp_ctx, &per_commitment_point, &self.remote_tx_cache.remote_delayed_payment_base_key, &self.remote_tx_cache.remote_htlc_base_key, &self.key_storage.pubkeys().revocation_basepoint, &self.key_storage.pubkeys().htlc_basepoint) {
let mut this_htlc = None;
if let Some(htlcs) = self.remote_tx_cache.per_htlc.get(&outp.txid) {
let witness_script = chan_utils::get_htlc_redeemscript_with_explicit_keys(&this_htlc.unwrap(), &chan_keys.a_htlc_key, &chan_keys.b_htlc_key, &chan_keys.revocation_key);
if !preimage.is_some() { bumped_tx.lock_time = *locktime }; // Right now we don't aggregate time-locked transaction, if we do we should set lock_time before to avoid breaking hash computation
- let sighash_parts = bip143::SighashComponents::new(&bumped_tx);
- let sighash = hash_to_message!(&sighash_parts.sighash_all(&bumped_tx.input[i], &witness_script, *amount)[..]);
- let sig = self.secp_ctx.sign(&sighash, &key);
- bumped_tx.input[i].witness.push(sig.serialize_der().to_vec());
- bumped_tx.input[i].witness[0].push(SigHashType::All as u8);
- if let &Some(preimage) = preimage {
- bumped_tx.input[i].witness.push(preimage.clone().0.to_vec());
- } else {
- // Due to BIP146 (MINIMALIF) this must be a zero-length element to relay.
- bumped_tx.input[i].witness.push(vec![]);
+ if let Ok(sig) = self.key_storage.sign_remote_htlc_transaction(&bumped_tx, i, &witness_script, *amount, &per_commitment_point, preimage, &self.secp_ctx) {
+ bumped_tx.input[i].witness.push(sig.serialize_der().to_vec());
+ bumped_tx.input[i].witness[0].push(SigHashType::All as u8);
+ if let &Some(preimage) = preimage {
+ bumped_tx.input[i].witness.push(preimage.0.to_vec());
+ } else {
+ // Due to BIP146 (MINIMALIF) this must be a zero-length element to relay.
+ bumped_tx.input[i].witness.push(vec![]);
+ }
+ bumped_tx.input[i].witness.push(witness_script.clone().into_bytes());
}
- bumped_tx.input[i].witness.push(witness_script.clone().into_bytes());
log_trace!(self, "Going to broadcast Claim Transaction {} claiming remote {} htlc output {} from {} with new feerate {}...", bumped_tx.txid(), if preimage.is_some() { "offered" } else { "received" }, outp.vout, outp.txid, new_feerate);
}
},
use ln::chan_utils::{HTLCOutputInCommitment, TxCreationKeys, ChannelPublicKeys, LocalCommitmentTransaction};
use ln::{chan_utils, msgs};
+use ln::channelmanager::PaymentPreimage;
use chain::keysinterface::{ChannelKeys, InMemoryChannelKeys};
use std::cmp;
Ok(self.inner.sign_justice_transaction(justice_tx, input, witness_script, amount, per_commitment_key, revocation_pubkey, is_htlc, secp_ctx).unwrap())
}
+ fn sign_remote_htlc_transaction<T: secp256k1::Signing>(&self, htlc_tx: &Transaction, input: usize, witness_script: &Script, amount: u64, per_commitment_point: &PublicKey, preimage: &Option<PaymentPreimage>, secp_ctx: &Secp256k1<T>) -> Result<Signature, ()> {
+ Ok(self.inner.sign_remote_htlc_transaction(htlc_tx, input, witness_script, amount, per_commitment_point, preimage, 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())
}
projects / rust-lightning / commitdiff