use ln::chan_utils::HTLCOutputInCommitment;
use ln::channelmanager::{HTLCSource, PaymentPreimage, PaymentHash};
use ln::channel::{ACCEPTED_HTLC_SCRIPT_WEIGHT, OFFERED_HTLC_SCRIPT_WEIGHT};
-use chain::chaininterface::{ChainListener, ChainWatchInterface, BroadcasterInterface};
+use chain::chaininterface::{ChainListener, ChainWatchInterface, BroadcasterInterface, FeeEstimator, ConfirmationTarget};
use chain::transaction::OutPoint;
use chain::keysinterface::SpendableOutputDescriptor;
use util::logger::Logger;
pending_events: Mutex<Vec<events::Event>>,
pending_htlc_updated: Mutex<HashMap<PaymentHash, Vec<(HTLCSource, Option<PaymentPreimage>)>>>,
logger: Arc<Logger>,
+ fee_estimator: Arc<FeeEstimator>
}
impl<Key : Send + cmp::Eq + hash::Hash> ChainListener for SimpleManyChannelMonitor<Key> {
{
let mut monitors = self.monitors.lock().unwrap();
for monitor in monitors.values_mut() {
- let (txn_outputs, spendable_outputs, mut htlc_updated) = monitor.block_connected(txn_matched, height, &block_hash, &*self.broadcaster);
+ let (txn_outputs, spendable_outputs, mut htlc_updated) = monitor.block_connected(txn_matched, height, &block_hash, &*self.broadcaster, &*self.fee_estimator);
if spendable_outputs.len() > 0 {
new_events.push(events::Event::SpendableOutputs {
outputs: spendable_outputs,
impl<Key : Send + cmp::Eq + hash::Hash + 'static> SimpleManyChannelMonitor<Key> {
/// Creates a new object which can be used to monitor several channels given the chain
/// interface with which to register to receive notifications.
- pub fn new(chain_monitor: Arc<ChainWatchInterface>, broadcaster: Arc<BroadcasterInterface>, logger: Arc<Logger>) -> Arc<SimpleManyChannelMonitor<Key>> {
+ pub fn new(chain_monitor: Arc<ChainWatchInterface>, broadcaster: Arc<BroadcasterInterface>, logger: Arc<Logger>, feeest: Arc<FeeEstimator>) -> Arc<SimpleManyChannelMonitor<Key>> {
let res = Arc::new(SimpleManyChannelMonitor {
monitors: Mutex::new(HashMap::new()),
chain_monitor,
pending_events: Mutex::new(Vec::new()),
pending_htlc_updated: Mutex::new(HashMap::new()),
logger,
+ fee_estimator: feeest,
});
let weak_res = Arc::downgrade(&res);
res.chain_monitor.register_listener(weak_res);
htlc_outputs: Vec<(HTLCOutputInCommitment, Option<(Signature, Signature)>, Option<HTLCSource>)>,
}
+enum InputDescriptors {
+ RevokedOfferedHTLC,
+ RevokedReceivedHTLC,
+ OfferedHTLC,
+ ReceivedHTLC,
+ RevokedOutput, // either a revoked to_local output on commitment tx, a revoked HTLC-Timeout output or a revoked HTLC-Success output
+}
+
const SERIALIZATION_VERSION: u8 = 1;
const MIN_SERIALIZATION_VERSION: u8 = 1;
}
}
+ fn get_witnesses_weight(inputs: &[InputDescriptors]) -> u64 {
+ let mut tx_weight = 2; // count segwit flags
+ for inp in inputs {
+ // We use expected weight (and not actual) as signatures and time lock delays may vary
+ tx_weight += match inp {
+ // number_of_witness_elements + sig_length + revocation_sig + pubkey_length + revocationpubkey + witness_script_length + witness_script
+ &InputDescriptors::RevokedOfferedHTLC => {
+ 1 + 1 + 73 + 1 + 33 + 1 + 133
+ },
+ // number_of_witness_elements + sig_length + revocation_sig + pubkey_length + revocationpubkey + witness_script_length + witness_script
+ &InputDescriptors::RevokedReceivedHTLC => {
+ 1 + 1 + 73 + 1 + 33 + 1 + 139
+ },
+ // number_of_witness_elements + sig_length + remotehtlc_sig + preimage_length + preimage + witness_script_length + witness_script
+ &InputDescriptors::OfferedHTLC => {
+ 1 + 1 + 73 + 1 + 32 + 1 + 133
+ },
+ // number_of_witness_elements + sig_length + revocation_sig + pubkey_length + revocationpubkey + witness_script_length + witness_script
+ &InputDescriptors::ReceivedHTLC => {
+ 1 + 1 + 73 + 1 + 1 + 1 + 139
+ },
+ // number_of_witness_elements + sig_length + revocation_sig + true_length + op_true + witness_script_length + witness_script
+ &InputDescriptors::RevokedOutput => {
+ 1 + 1 + 73 + 1 + 1 + 1 + 77
+ },
+ };
+ }
+ tx_weight
+ }
+
#[inline]
fn place_secret(idx: u64) -> u8 {
for i in 0..48 {
/// HTLC-Success/HTLC-Timeout transactions.
/// Return updates for HTLC pending in the channel and failed automatically by the broadcast of
/// revoked remote commitment tx
- fn check_spend_remote_transaction(&mut self, tx: &Transaction, height: u32) -> (Vec<Transaction>, (Sha256dHash, Vec<TxOut>), Vec<SpendableOutputDescriptor>, Vec<(HTLCSource, Option<PaymentPreimage>, PaymentHash)>) {
+ fn check_spend_remote_transaction(&mut self, tx: &Transaction, height: u32
, fee_estimator: &FeeEstimator) -> (Vec<Transaction>, (Sha256dHash, Vec<TxOut>), Vec<SpendableOutputDescriptor>, Vec<(HTLCSource, Option<PaymentPreimage>, PaymentHash)>) {
// Most secp and related errors trying to create keys means we have no hope of constructing
// a spend transaction...so we return no transactions to broadcast
let mut txn_to_broadcast = Vec::new();
let mut values = Vec::new();
let mut inputs = Vec::new();
let mut htlc_idxs = Vec::new();
+ let mut input_descriptors = Vec::new();
for (idx, outp) in tx.output.iter().enumerate() {
if outp.script_pubkey == revokeable_p2wsh {
htlc_idxs.push(None);
values.push(outp.value);
total_value += outp.value;
+ input_descriptors.push(InputDescriptors::RevokedOutput);
} else if Some(&outp.script_pubkey) == local_payment_p2wpkh.as_ref() {
spendable_outputs.push(SpendableOutputDescriptor::DynamicOutputP2WPKH {
outpoint: BitcoinOutPoint { txid: commitment_txid, vout: idx as u32 },
htlc_idxs.push(Some(idx));
values.push(tx.output[transaction_output_index as usize].value);
total_value += htlc.amount_msat / 1000;
+ input_descriptors.push(if htlc.offered { InputDescriptors::RevokedOfferedHTLC } else { InputDescriptors::RevokedReceivedHTLC });
} else {
let mut single_htlc_tx = Transaction {
version: 2,
input: vec![input],
output: vec!(TxOut {
script_pubkey: self.destination_script.clone(),
- value: htlc.amount_msat / 1000, //TODO: - fee
+ value: htlc.amount_msat / 1000,
}),
};
+ single_htlc_tx.output[0].value -= fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * (single_htlc_tx.get_weight() + Self::get_witnesses_weight(&[if htlc.offered { InputDescriptors::RevokedOfferedHTLC } else { InputDescriptors::RevokedReceivedHTLC }])) / 1000;
let sighash_parts = bip143::SighashComponents::new(&single_htlc_tx);
sign_input!(sighash_parts, single_htlc_tx.input[0], Some(idx), htlc.amount_msat / 1000);
txn_to_broadcast.push(single_htlc_tx);
let outputs = vec!(TxOut {
script_pubkey: self.destination_script.clone(),
- value: total_value, //TODO: - fee
+ value: total_value,
});
let mut spend_tx = Transaction {
version: 2,
input: inputs,
output: outputs,
};
+ spend_tx.output[0].value -= fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * (spend_tx.get_weight() + Self::get_witnesses_weight(&input_descriptors[..])) / 1000;
let mut values_drain = values.drain(..);
let sighash_parts = bip143::SighashComponents::new(&spend_tx);
let mut total_value = 0;
let mut values = Vec::new();
let mut inputs = Vec::new();
+ let mut input_descriptors = Vec::new();
macro_rules! sign_input {
($sighash_parts: expr, $input: expr, $amount: expr, $preimage: expr) => {
inputs.push(input);
values.push((tx.output[transaction_output_index as usize].value, payment_preimage));
total_value += htlc.amount_msat / 1000;
+ input_descriptors.push(if htlc.offered { InputDescriptors::OfferedHTLC } else { InputDescriptors::ReceivedHTLC });
} else {
let mut single_htlc_tx = Transaction {
version: 2,
input: vec![input],
output: vec!(TxOut {
script_pubkey: self.destination_script.clone(),
- value: htlc.amount_msat / 1000, //TODO: - fee
+ value: htlc.amount_msat / 1000,
}),
};
+ single_htlc_tx.output[0].value -= fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * (single_htlc_tx.get_weight() + Self::get_witnesses_weight(&[if htlc.offered { InputDescriptors::OfferedHTLC } else { InputDescriptors::ReceivedHTLC }])) / 1000;
let sighash_parts = bip143::SighashComponents::new(&single_htlc_tx);
sign_input!(sighash_parts, single_htlc_tx.input[0], htlc.amount_msat / 1000, payment_preimage.0.to_vec());
spendable_outputs.push(SpendableOutputDescriptor::StaticOutput {
let outputs = vec!(TxOut {
script_pubkey: self.destination_script.clone(),
- value: total_value, //TODO: - fee
+ value: total_value
});
let mut spend_tx = Transaction {
version: 2,
input: inputs,
output: outputs,
};
+ spend_tx.output[0].value -= fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::HighPriority) * (spend_tx.get_weight() + Self::get_witnesses_weight(&input_descriptors[..])) / 1000;
let mut values_drain = values.drain(..);
let sighash_parts = bip143::SighashComponents::new(&spend_tx);
}
}
- fn block_connected(&mut self, txn_matched: &[&Transaction], height: u32, block_hash: &Sha256dHash, broadcaster: &BroadcasterInterface)-> (Vec<(Sha256dHash, Vec<TxOut>)>, Vec<SpendableOutputDescriptor>, Vec<(HTLCSource, Option<PaymentPreimage>, PaymentHash)>) {
+ fn block_connected(&mut self, txn_matched: &[&Transaction], height: u32, block_hash: &Sha256dHash, broadcaster: &BroadcasterInterface
, fee_estimator: &FeeEstimator)-> (Vec<(Sha256dHash, Vec<TxOut>)>, Vec<SpendableOutputDescriptor>, Vec<(HTLCSource, Option<PaymentPreimage>, PaymentHash)>) {
let mut watch_outputs = Vec::new();
let mut spendable_outputs = Vec::new();
let mut htlc_updated = Vec::new();
}
};
if funding_txo.is_none() || (prevout.txid == funding_txo.as_ref().unwrap().0.txid && prevout.vout == funding_txo.as_ref().unwrap().0.index as u32) {
- let (remote_txn, new_outputs, mut spendable_output, mut updated) = self.check_spend_remote_transaction(tx, height);
+ let (remote_txn, new_outputs, mut spendable_output, mut updated) = self.check_spend_remote_transaction(tx, height, fee_estimator);
txn = remote_txn;
spendable_outputs.append(&mut spendable_output);
if !new_outputs.1.is_empty() {
projects / rust-lightning / blobdiff