use crate::ln::msgs;
use crate::ln::msgs::{DecodeError, OptionalField, DataLossProtect};
use crate::ln::script::{self, ShutdownScript};
-use crate::ln::channelmanager::{self, CounterpartyForwardingInfo, PendingHTLCStatus, HTLCSource, HTLCFailReason, HTLCFailureMsg, PendingHTLCInfo, RAACommitmentOrder, BREAKDOWN_TIMEOUT, MIN_CLTV_EXPIRY_DELTA, MAX_LOCAL_BREAKDOWN_TIMEOUT};
+use crate::ln::channelmanager::{self, CounterpartyForwardingInfo, PendingHTLCStatus, HTLCSource, HTLCFailureMsg, PendingHTLCInfo, RAACommitmentOrder, BREAKDOWN_TIMEOUT, MIN_CLTV_EXPIRY_DELTA, MAX_LOCAL_BREAKDOWN_TIMEOUT};
use crate::ln::chan_utils::{CounterpartyCommitmentSecrets, TxCreationKeys, HTLCOutputInCommitment, htlc_success_tx_weight, htlc_timeout_tx_weight, make_funding_redeemscript, ChannelPublicKeys, CommitmentTransaction, HolderCommitmentTransaction, ChannelTransactionParameters, CounterpartyChannelTransactionParameters, MAX_HTLCS, get_commitment_transaction_number_obscure_factor, ClosingTransaction};
use crate::ln::chan_utils;
+use crate::ln::onion_utils::HTLCFailReason;
use crate::chain::BestBlock;
use crate::chain::chaininterface::{FeeEstimator, ConfirmationTarget, LowerBoundedFeeEstimator};
use crate::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdate, ChannelMonitorUpdateStep, LATENCY_GRACE_PERIOD_BLOCKS};
use crate::chain::transaction::{OutPoint, TransactionData};
-use crate::chain::keysinterface::{Sign, KeysInterface, BaseSign};
+use crate::chain::keysinterface::{Sign, EntropySource, KeysInterface, BaseSign, SignerProvider};
use crate::util::events::ClosureReason;
use crate::util::ser::{Readable, ReadableArgs, Writeable, Writer, VecWriter};
use crate::util::logger::Logger;
channel_ready_event_emitted: bool,
/// The unique identifier used to re-derive the private key material for the channel through
- /// [`KeysInterface::derive_channel_signer`].
+ /// [`SignerProvider::derive_channel_signer`].
channel_keys_id: [u8; 32],
}
/// our counterparty!)
/// The result is a transaction which we can revoke broadcastership of (ie a "local" transaction)
/// TODO Some magic rust shit to compile-time check this?
- fn build_holder_transaction_keys(&self, commitment_number: u64) -> Result<TxCreationKeys, ChannelError> {
+ fn build_holder_transaction_keys(&self, commitment_number: u64) -> TxCreationKeys {
let per_commitment_point = self.holder_signer.get_per_commitment_point(commitment_number, &self.secp_ctx);
let delayed_payment_base = &self.get_holder_pubkeys().delayed_payment_basepoint;
let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
let counterparty_pubkeys = self.get_counterparty_pubkeys();
- Ok(secp_check!(TxCreationKeys::derive_new(&self.secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint), "Local tx keys generation got bogus keys".to_owned()))
+ TxCreationKeys::derive_new(&self.secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint)
}
#[inline]
/// Creates a set of keys for build_commitment_transaction to generate a transaction which we
/// will sign and send to our counterparty.
/// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
- fn build_remote_transaction_keys(&self) -> Result<TxCreationKeys, ChannelError> {
+ fn build_remote_transaction_keys(&self) -> TxCreationKeys {
//TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
//may see payments to it!
let revocation_basepoint = &self.get_holder_pubkeys().revocation_basepoint;
let htlc_basepoint = &self.get_holder_pubkeys().htlc_basepoint;
let counterparty_pubkeys = self.get_counterparty_pubkeys();
- Ok(secp_check!(TxCreationKeys::derive_new(&self.secp_ctx, &self.counterparty_cur_commitment_point.unwrap(), &counterparty_pubkeys.delayed_payment_basepoint, &counterparty_pubkeys.htlc_basepoint, revocation_basepoint, htlc_basepoint), "Remote tx keys generation got bogus keys".to_owned()))
+ TxCreationKeys::derive_new(&self.secp_ctx, &self.counterparty_cur_commitment_point.unwrap(), &counterparty_pubkeys.delayed_payment_basepoint, &counterparty_pubkeys.htlc_basepoint, revocation_basepoint, htlc_basepoint)
}
/// Gets the redeemscript for the funding transaction output (ie the funding transaction output
/// an HTLC more than once or fulfill once and then attempt to fail after reconnect. We cannot,
/// however, fail more than once as we wait for an upstream failure to be irrevocably committed
/// before we fail backwards.
- /// If we do fail twice, we debug_assert!(false) and return Ok(None). Thus, will always return
- /// Ok(_) if debug assertions are turned on or preconditions are met.
- pub fn get_update_fail_htlc<L: Deref>(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket, logger: &L) -> Result<Option<msgs::UpdateFailHTLC>, ChannelError> where L::Target: Logger {
+ ///
+ /// If we do fail twice, we `debug_assert!(false)` and return `Ok(None)`. Thus, this will always
+ /// return `Ok(_)` if preconditions are met. In any case, `Err`s will only be
+ /// [`ChannelError::Ignore`].
+ pub fn queue_fail_htlc<L: Deref>(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket, logger: &L)
+ -> Result<(), ChannelError> where L::Target: Logger {
+ self.fail_htlc(htlc_id_arg, err_packet, true, logger)
+ .map(|msg_opt| assert!(msg_opt.is_none(), "We forced holding cell?"))
+ }
+
+ /// We can only have one resolution per HTLC. In some cases around reconnect, we may fulfill
+ /// an HTLC more than once or fulfill once and then attempt to fail after reconnect. We cannot,
+ /// however, fail more than once as we wait for an upstream failure to be irrevocably committed
+ /// before we fail backwards.
+ ///
+ /// If we do fail twice, we `debug_assert!(false)` and return `Ok(None)`. Thus, this will always
+ /// return `Ok(_)` if preconditions are met. In any case, `Err`s will only be
+ /// [`ChannelError::Ignore`].
+ fn fail_htlc<L: Deref>(&mut self, htlc_id_arg: u64, err_packet: msgs::OnionErrorPacket, mut force_holding_cell: bool, logger: &L)
+ -> Result<Option<msgs::UpdateFailHTLC>, ChannelError> where L::Target: Logger {
if (self.channel_state & (ChannelState::ChannelReady as u32)) != (ChannelState::ChannelReady as u32) {
panic!("Was asked to fail an HTLC when channel was not in an operational state");
}
return Ok(None);
}
- // Now update local state:
if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::PeerDisconnected as u32 | ChannelState::MonitorUpdateInProgress as u32)) != 0 {
+ debug_assert!(force_holding_cell, "!force_holding_cell is only called when emptying the holding cell, so we shouldn't end up back in it!");
+ force_holding_cell = true;
+ }
+
+ // Now update local state:
+ if force_holding_cell {
for pending_update in self.holding_cell_htlc_updates.iter() {
match pending_update {
&HTLCUpdateAwaitingACK::ClaimHTLC { htlc_id, .. } => {
fn funding_created_signature<L: Deref>(&mut self, sig: &Signature, logger: &L) -> Result<(Txid, CommitmentTransaction, Signature), ChannelError> where L::Target: Logger {
let funding_script = self.get_funding_redeemscript();
- let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
+ let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number);
let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, logger).tx;
{
let trusted_tx = initial_commitment_tx.trust();
secp_check!(self.secp_ctx.verify_ecdsa(&sighash, &sig, self.counterparty_funding_pubkey()), "Invalid funding_created signature from peer".to_owned());
}
- let counterparty_keys = self.build_remote_transaction_keys()?;
+ let counterparty_keys = self.build_remote_transaction_keys();
let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
&self.get_counterparty_pubkeys().funding_pubkey
}
- pub fn funding_created<L: Deref>(&mut self, msg: &msgs::FundingCreated, best_block: BestBlock, logger: &L) -> Result<(msgs::FundingSigned, ChannelMonitor<Signer>, Option<msgs::ChannelReady>), ChannelError> where L::Target: Logger {
+ pub fn funding_created<K: Deref, L: Deref>(
+ &mut self, msg: &msgs::FundingCreated, best_block: BestBlock, keys_source: &K, logger: &L
+ ) -> Result<(msgs::FundingSigned, ChannelMonitor<<K::Target as SignerProvider>::Signer>, Option<msgs::ChannelReady>), ChannelError>
+ where
+ K::Target: KeysInterface,
+ L::Target: Logger
+ {
if self.is_outbound() {
return Err(ChannelError::Close("Received funding_created for an outbound channel?".to_owned()));
}
let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
let shutdown_script = self.shutdown_scriptpubkey.clone().map(|script| script.into_inner());
- let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
+ let mut monitor_signer = keys_source.derive_channel_signer(self.channel_value_satoshis, self.channel_keys_id);
+ monitor_signer.provide_channel_parameters(&self.channel_transaction_parameters);
+ let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), monitor_signer,
shutdown_script, self.get_holder_selected_contest_delay(),
&self.destination_script, (funding_txo, funding_txo_script.clone()),
&self.channel_transaction_parameters,
/// Handles a funding_signed message from the remote end.
/// If this call is successful, broadcast the funding transaction (and not before!)
- pub fn funding_signed<L: Deref>(&mut self, msg: &msgs::FundingSigned, best_block: BestBlock, logger: &L) -> Result<(ChannelMonitor<Signer>, Transaction, Option<msgs::ChannelReady>), ChannelError> where L::Target: Logger {
+ pub fn funding_signed<K: Deref, L: Deref>(
+ &mut self, msg: &msgs::FundingSigned, best_block: BestBlock, keys_source: &K, logger: &L
+ ) -> Result<(ChannelMonitor<<K::Target as SignerProvider>::Signer>, Transaction, Option<msgs::ChannelReady>), ChannelError>
+ where
+ K::Target: KeysInterface,
+ L::Target: Logger
+ {
if !self.is_outbound() {
return Err(ChannelError::Close("Received funding_signed for an inbound channel?".to_owned()));
}
let funding_script = self.get_funding_redeemscript();
- let counterparty_keys = self.build_remote_transaction_keys()?;
+ let counterparty_keys = self.build_remote_transaction_keys();
let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
let counterparty_trusted_tx = counterparty_initial_commitment_tx.trust();
let counterparty_initial_bitcoin_tx = counterparty_trusted_tx.built_transaction();
log_trace!(logger, "Initial counterparty tx for channel {} is: txid {} tx {}",
log_bytes!(self.channel_id()), counterparty_initial_bitcoin_tx.txid, encode::serialize_hex(&counterparty_initial_bitcoin_tx.transaction));
- let holder_signer = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
+ let holder_signer = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number);
let initial_commitment_tx = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &holder_signer, true, false, logger).tx;
{
let trusted_tx = initial_commitment_tx.trust();
let funding_txo_script = funding_redeemscript.to_v0_p2wsh();
let obscure_factor = get_commitment_transaction_number_obscure_factor(&self.get_holder_pubkeys().payment_point, &self.get_counterparty_pubkeys().payment_point, self.is_outbound());
let shutdown_script = self.shutdown_scriptpubkey.clone().map(|script| script.into_inner());
- let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), self.holder_signer.clone(),
+ let mut monitor_signer = keys_source.derive_channel_signer(self.channel_value_satoshis, self.channel_keys_id);
+ monitor_signer.provide_channel_parameters(&self.channel_transaction_parameters);
+ let channel_monitor = ChannelMonitor::new(self.secp_ctx.clone(), monitor_signer,
shutdown_script, self.get_holder_selected_contest_delay(),
&self.destination_script, (funding_txo, funding_txo_script),
&self.channel_transaction_parameters,
let funding_script = self.get_funding_redeemscript();
- let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number).map_err(|e| (None, e))?;
+ let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number);
let commitment_stats = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, false, logger);
let commitment_txid = {
} else { Ok((None, Vec::new())) }
}
- /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them
- /// fulfilling or failing the last pending HTLC)
+ /// Frees any pending commitment updates in the holding cell, generating the relevant messages
+ /// for our counterparty.
fn free_holding_cell_htlcs<L: Deref>(&mut self, logger: &L) -> Result<(Option<(msgs::CommitmentUpdate, ChannelMonitorUpdate)>, Vec<(HTLCSource, PaymentHash)>), ChannelError> where L::Target: Logger {
assert_eq!(self.channel_state & ChannelState::MonitorUpdateInProgress as u32, 0);
if self.holding_cell_htlc_updates.len() != 0 || self.holding_cell_update_fee.is_some() {
// to rebalance channels.
match &htlc_update {
&HTLCUpdateAwaitingACK::AddHTLC {amount_msat, cltv_expiry, ref payment_hash, ref source, ref onion_routing_packet, ..} => {
- match self.send_htlc(amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone(), logger) {
+ match self.send_htlc(amount_msat, *payment_hash, cltv_expiry, source.clone(), onion_routing_packet.clone(), false, logger) {
Ok(update_add_msg_option) => update_add_htlcs.push(update_add_msg_option.unwrap()),
Err(e) => {
match e {
monitor_update.updates.append(&mut additional_monitor_update.updates);
},
&HTLCUpdateAwaitingACK::FailHTLC { htlc_id, ref err_packet } => {
- match self.get_update_fail_htlc(htlc_id, err_packet.clone(), logger) {
+ match self.fail_htlc(htlc_id, err_packet.clone(), false, logger) {
Ok(update_fail_msg_option) => {
// If an HTLC failure was previously added to the holding cell (via
- // `get_update_fail_htlc`) then generating the fail message itself
- // must not fail - we should never end up in a state where we
- // double-fail an HTLC or fail-then-claim an HTLC as it indicates
- // we didn't wait for a full revocation before failing.
+ // `queue_fail_htlc`) then generating the fail message itself must
+ // not fail - we should never end up in a state where we double-fail
+ // an HTLC or fail-then-claim an HTLC as it indicates we didn't wait
+ // for a full revocation before failing.
update_fail_htlcs.push(update_fail_msg_option.unwrap())
},
Err(e) => {
return Ok((None, htlcs_to_fail));
}
let update_fee = if let Some(feerate) = self.holding_cell_update_fee.take() {
- self.send_update_fee(feerate, logger)
+ self.send_update_fee(feerate, false, logger)
} else {
None
};
}
}
+ /// Queues up an outbound update fee by placing it in the holding cell. You should call
+ /// [`Self::maybe_free_holding_cell_htlcs`] in order to actually generate and send the
+ /// commitment update.
+ pub fn queue_update_fee<L: Deref>(&mut self, feerate_per_kw: u32, logger: &L) where L::Target: Logger {
+ let msg_opt = self.send_update_fee(feerate_per_kw, true, logger);
+ assert!(msg_opt.is_none(), "We forced holding cell?");
+ }
+
/// Adds a pending update to this channel. See the doc for send_htlc for
/// further details on the optionness of the return value.
/// If our balance is too low to cover the cost of the next commitment transaction at the
/// new feerate, the update is cancelled.
- /// You MUST call send_commitment prior to any other calls on this Channel
- fn send_update_fee<L: Deref>(&mut self, feerate_per_kw: u32, logger: &L) -> Option<msgs::UpdateFee> where L::Target: Logger {
+ ///
+ /// You MUST call [`Self::send_commitment_no_state_update`] prior to any other calls on this
+ /// [`Channel`] if `force_holding_cell` is false.
+ fn send_update_fee<L: Deref>(&mut self, feerate_per_kw: u32, mut force_holding_cell: bool, logger: &L) -> Option<msgs::UpdateFee> where L::Target: Logger {
if !self.is_outbound() {
panic!("Cannot send fee from inbound channel");
}
// Before proposing a feerate update, check that we can actually afford the new fee.
let inbound_stats = self.get_inbound_pending_htlc_stats(Some(feerate_per_kw));
let outbound_stats = self.get_outbound_pending_htlc_stats(Some(feerate_per_kw));
- let keys = if let Ok(keys) = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number) { keys } else { return None; };
+ let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number);
let commitment_stats = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, true, logger);
let buffer_fee_msat = Channel::<Signer>::commit_tx_fee_sat(feerate_per_kw, commitment_stats.num_nondust_htlcs + outbound_stats.on_holder_tx_holding_cell_htlcs_count as usize + CONCURRENT_INBOUND_HTLC_FEE_BUFFER as usize, self.opt_anchors()) * 1000;
let holder_balance_msat = commitment_stats.local_balance_msat - outbound_stats.holding_cell_msat;
}
if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateInProgress as u32)) != 0 {
+ force_holding_cell = true;
+ }
+
+ if force_holding_cell {
self.holding_cell_update_fee = Some(feerate_per_kw);
return None;
}
})
}
- pub fn send_update_fee_and_commit<L: Deref>(&mut self, feerate_per_kw: u32, logger: &L) -> Result<Option<(msgs::UpdateFee, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> where L::Target: Logger {
- match self.send_update_fee(feerate_per_kw, logger) {
- Some(update_fee) => {
- let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
- Ok(Some((update_fee, commitment_signed, monitor_update)))
- },
- None => Ok(None)
- }
- }
-
/// Removes any uncommitted inbound HTLCs and resets the state of uncommitted outbound HTLC
/// updates, to be used on peer disconnection. After this, update_*_htlc messages need to be
/// resent.
/// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
fn get_outbound_funding_created_signature<L: Deref>(&mut self, logger: &L) -> Result<Signature, ChannelError> where L::Target: Logger {
- let counterparty_keys = self.build_remote_transaction_keys()?;
+ let counterparty_keys = self.build_remote_transaction_keys();
let counterparty_initial_commitment_tx = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, false, logger).tx;
Ok(self.holder_signer.sign_counterparty_commitment(&counterparty_initial_commitment_tx, Vec::new(), &self.secp_ctx)
.map_err(|_| ChannelError::Close("Failed to get signatures for new commitment_signed".to_owned()))?.0)
// Send stuff to our remote peers:
+ /// Queues up an outbound HTLC to send by placing it in the holding cell. You should call
+ /// [`Self::maybe_free_holding_cell_htlcs`] in order to actually generate and send the
+ /// commitment update.
+ ///
+ /// `Err`s will only be [`ChannelError::Ignore`].
+ pub fn queue_add_htlc<L: Deref>(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource,
+ onion_routing_packet: msgs::OnionPacket, logger: &L)
+ -> Result<(), ChannelError> where L::Target: Logger {
+ self
+ .send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet, true, logger)
+ .map(|msg_opt| assert!(msg_opt.is_none(), "We forced holding cell?"))
+ .map_err(|err| {
+ if let ChannelError::Ignore(_) = err { /* fine */ }
+ else { debug_assert!(false, "Queueing cannot trigger channel failure"); }
+ err
+ })
+ }
+
/// Adds a pending outbound HTLC to this channel, note that you probably want
- /// send_htlc_and_commit instead cause you'll want both messages at once.
+ /// [`Self::send_htlc_and_commit`] instead cause you'll want both messages at once.
///
/// This returns an optional UpdateAddHTLC as we may be in a state where we cannot add HTLCs on
/// the wire:
/// we may not yet have sent the previous commitment update messages and will need to
/// regenerate them.
///
- /// You MUST call send_commitment prior to calling any other methods on this Channel!
+ /// You MUST call [`Self::send_commitment_no_state_update`] prior to calling any other methods
+ /// on this [`Channel`] if `force_holding_cell` is false.
///
- /// If an Err is returned, it's a ChannelError::Ignore!
- pub fn send_htlc<L: Deref>(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket, logger: &L) -> Result<Option<msgs::UpdateAddHTLC>, ChannelError> where L::Target: Logger {
+ /// `Err`s will only be [`ChannelError::Ignore`].
+ fn send_htlc<L: Deref>(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource,
+ onion_routing_packet: msgs::OnionPacket, mut force_holding_cell: bool, logger: &L)
+ -> Result<Option<msgs::UpdateAddHTLC>, ChannelError> where L::Target: Logger {
if (self.channel_state & (ChannelState::ChannelReady as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelReady as u32) {
return Err(ChannelError::Ignore("Cannot send HTLC until channel is fully established and we haven't started shutting down".to_owned()));
}
return Err(ChannelError::Ignore(format!("Cannot send value that would put us over the max HTLC value in flight our peer will accept ({})", self.counterparty_max_htlc_value_in_flight_msat)));
}
- let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number)?;
+ let keys = self.build_holder_transaction_keys(self.cur_holder_commitment_transaction_number);
let commitment_stats = self.build_commitment_transaction(self.cur_holder_commitment_transaction_number, &keys, true, true, logger);
if !self.is_outbound() {
// Check that we won't violate the remote channel reserve by adding this HTLC.
return Err(ChannelError::Ignore(format!("Cannot send value that would put our balance under counterparty-announced channel reserve value ({})", chan_reserve_msat)));
}
- // Now update local state:
if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32 | ChannelState::MonitorUpdateInProgress as u32)) != 0 {
+ force_holding_cell = true;
+ }
+
+ // Now update local state:
+ if force_holding_cell {
self.holding_cell_htlc_updates.push(HTLCUpdateAwaitingACK::AddHTLC {
amount_msat,
payment_hash,
Ok(Some(res))
}
- /// Creates a signed commitment transaction to send to the remote peer.
- /// Always returns a ChannelError::Close if an immediately-preceding (read: the
- /// last call to this Channel) send_htlc returned Ok(Some(_)) and there is an Err.
- /// May panic if called except immediately after a successful, Ok(Some(_))-returning send_htlc.
- pub fn send_commitment<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
- if (self.channel_state & (ChannelState::ChannelReady as u32)) != (ChannelState::ChannelReady as u32) {
- panic!("Cannot create commitment tx until channel is fully established");
- }
- if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) {
- panic!("Cannot create commitment tx until remote revokes their previous commitment");
- }
- if (self.channel_state & (ChannelState::PeerDisconnected as u32)) == (ChannelState::PeerDisconnected as u32) {
- panic!("Cannot create commitment tx while disconnected, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
- }
- if (self.channel_state & (ChannelState::MonitorUpdateInProgress as u32)) == (ChannelState::MonitorUpdateInProgress as u32) {
- panic!("Cannot create commitment tx while awaiting monitor update unfreeze, as send_htlc will have returned an Err so a send_commitment precondition has been violated");
- }
- let mut have_updates = self.is_outbound() && self.pending_update_fee.is_some();
- for htlc in self.pending_outbound_htlcs.iter() {
- if let OutboundHTLCState::LocalAnnounced(_) = htlc.state {
- have_updates = true;
- }
- if have_updates { break; }
- }
- for htlc in self.pending_inbound_htlcs.iter() {
- if let InboundHTLCState::LocalRemoved(_) = htlc.state {
- have_updates = true;
- }
- if have_updates { break; }
- }
- if !have_updates {
- panic!("Cannot create commitment tx until we have some updates to send");
- }
- self.send_commitment_no_status_check(logger)
- }
/// Only fails in case of bad keys
fn send_commitment_no_status_check<L: Deref>(&mut self, logger: &L) -> Result<(msgs::CommitmentSigned, ChannelMonitorUpdate), ChannelError> where L::Target: Logger {
log_trace!(logger, "Updating HTLC state for a newly-sent commitment_signed...");
/// Only fails in case of bad keys. Used for channel_reestablish commitment_signed generation
/// when we shouldn't change HTLC/channel state.
fn send_commitment_no_state_update<L: Deref>(&self, logger: &L) -> Result<(msgs::CommitmentSigned, (Txid, Vec<(HTLCOutputInCommitment, Option<&HTLCSource>)>)), ChannelError> where L::Target: Logger {
- let counterparty_keys = self.build_remote_transaction_keys()?;
+ let counterparty_keys = self.build_remote_transaction_keys();
let commitment_stats = self.build_commitment_transaction(self.cur_counterparty_commitment_transaction_number, &counterparty_keys, false, true, logger);
let counterparty_commitment_txid = commitment_stats.tx.trust().txid();
let (signature, htlc_signatures);
/// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction
/// to send to the remote peer in one go.
- /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for
- /// more info.
+ ///
+ /// Shorthand for calling [`Self::send_htlc`] followed by a commitment update, see docs on
+ /// [`Self::send_htlc`] and [`Self::send_commitment_no_state_update`] for more info.
pub fn send_htlc_and_commit<L: Deref>(&mut self, amount_msat: u64, payment_hash: PaymentHash, cltv_expiry: u32, source: HTLCSource, onion_routing_packet: msgs::OnionPacket, logger: &L) -> Result<Option<(msgs::UpdateAddHTLC, msgs::CommitmentSigned, ChannelMonitorUpdate)>, ChannelError> where L::Target: Logger {
- match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet, logger)? {
+ match self.send_htlc(amount_msat, payment_hash, cltv_expiry, source, onion_routing_packet, false, logger)? {
Some(update_add_htlc) => {
let (commitment_signed, monitor_update) = self.send_commitment_no_status_check(logger)?;
Ok(Some((update_add_htlc, commitment_signed, monitor_update)))
(monitor_update, dropped_outbound_htlcs)
}
- pub fn inflight_htlc_sources(&self) -> impl Iterator<Item=&HTLCSource> {
+ pub fn inflight_htlc_sources(&self) -> impl Iterator<Item=(&HTLCSource, &PaymentHash)> {
self.holding_cell_htlc_updates.iter()
.flat_map(|htlc_update| {
match htlc_update {
- HTLCUpdateAwaitingACK::AddHTLC { source, .. } => { Some(source) }
- _ => None
+ HTLCUpdateAwaitingACK::AddHTLC { source, payment_hash, .. }
+ => Some((source, payment_hash)),
+ _ => None,
}
})
- .chain(self.pending_outbound_htlcs.iter().map(|htlc| &htlc.source))
+ .chain(self.pending_outbound_htlcs.iter().map(|htlc| (&htlc.source, &htlc.payment_hash)))
}
}
}
const MAX_ALLOC_SIZE: usize = 64*1024;
-impl<'a, K: Deref> ReadableArgs<(&'a K, u32)> for Channel<<K::Target as KeysInterface>::Signer>
+impl<'a, K: Deref> ReadableArgs<(&'a K, u32)> for Channel<<K::Target as SignerProvider>::Signer>
where K::Target: KeysInterface {
fn read<R : io::Read>(reader: &mut R, args: (&'a K, u32)) -> Result<Self, DecodeError> {
let (keys_source, serialized_height) = args;
use crate::ln::chan_utils::{htlc_success_tx_weight, htlc_timeout_tx_weight};
use crate::chain::BestBlock;
use crate::chain::chaininterface::{FeeEstimator, LowerBoundedFeeEstimator, ConfirmationTarget};
- use crate::chain::keysinterface::{BaseSign, InMemorySigner, Recipient, KeyMaterial, KeysInterface};
+ use crate::chain::keysinterface::{BaseSign, InMemorySigner, Recipient, KeyMaterial, KeysInterface, EntropySource, NodeSigner, SignerProvider};
use crate::chain::transaction::OutPoint;
use crate::util::config::UserConfig;
use crate::util::enforcing_trait_impls::EnforcingSigner;
struct Keys {
signer: InMemorySigner,
}
- impl KeysInterface for Keys {
- type Signer = InMemorySigner;
+ impl EntropySource for Keys {
+ fn get_secure_random_bytes(&self) -> [u8; 32] { [0; 32] }
+ }
+
+ impl NodeSigner for Keys {
fn get_node_secret(&self, _recipient: Recipient) -> Result<SecretKey, ()> { panic!(); }
+
+ fn get_node_id(&self, recipient: Recipient) -> Result<PublicKey, ()> {
+ let secp_ctx = Secp256k1::signing_only();
+ Ok(PublicKey::from_secret_key(&secp_ctx, &self.get_node_secret(recipient)?))
+ }
+
fn ecdh(&self, _recipient: Recipient, _other_key: &PublicKey, _tweak: Option<&Scalar>) -> Result<SharedSecret, ()> { panic!(); }
+
fn get_inbound_payment_key_material(&self) -> KeyMaterial { panic!(); }
+
+ fn sign_invoice(&self, _hrp_bytes: &[u8], _invoice_data: &[u5], _recipient: Recipient) -> Result<RecoverableSignature, ()> { panic!(); }
+ }
+
+ impl SignerProvider for Keys {
+ type Signer = InMemorySigner;
+
+ fn generate_channel_keys_id(&self, _inbound: bool, _channel_value_satoshis: u64, _user_channel_id: u128) -> [u8; 32] {
+ self.signer.channel_keys_id()
+ }
+
+ fn derive_channel_signer(&self, _channel_value_satoshis: u64, _channel_keys_id: [u8; 32]) -> Self::Signer {
+ self.signer.clone()
+ }
+
+ fn read_chan_signer(&self, _data: &[u8]) -> Result<Self::Signer, DecodeError> { panic!(); }
+
fn get_destination_script(&self) -> Script {
let secp_ctx = Secp256k1::signing_only();
let channel_monitor_claim_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
let channel_close_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
ShutdownScript::new_p2wpkh_from_pubkey(PublicKey::from_secret_key(&secp_ctx, &channel_close_key))
}
-
- fn generate_channel_keys_id(&self, _inbound: bool, _channel_value_satoshis: u64, _user_channel_id: u128) -> [u8; 32] {
- self.signer.channel_keys_id()
- }
- fn derive_channel_signer(&self, _channel_value_satoshis: u64, _channel_keys_id: [u8; 32]) -> Self::Signer {
- self.signer.clone()
- }
- fn get_secure_random_bytes(&self) -> [u8; 32] { [0; 32] }
- fn read_chan_signer(&self, _data: &[u8]) -> Result<Self::Signer, DecodeError> { panic!(); }
- fn sign_invoice(&self, _hrp_bytes: &[u8], _invoice_data: &[u5], _recipient: Recipient) -> Result<RecoverableSignature, ()> { panic!(); }
}
+ impl KeysInterface for Keys {}
+
#[cfg(not(feature = "grind_signatures"))]
fn public_from_secret_hex(secp_ctx: &Secp256k1<bitcoin::secp256k1::All>, hex: &str) -> PublicKey {
PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&hex::decode(hex).unwrap()[..]).unwrap())
}]};
let funding_outpoint = OutPoint{ txid: tx.txid(), index: 0 };
let funding_created_msg = node_a_chan.get_outbound_funding_created(tx.clone(), funding_outpoint, &&logger).unwrap();
- let (funding_signed_msg, _, _) = node_b_chan.funding_created(&funding_created_msg, best_block, &&logger).unwrap();
+ let (funding_signed_msg, _, _) = node_b_chan.funding_created(&funding_created_msg, best_block, &&keys_provider, &&logger).unwrap();
// Node B --> Node A: funding signed
- let _ = node_a_chan.funding_signed(&funding_signed_msg, best_block, &&logger);
+ let _ = node_a_chan.funding_signed(&funding_signed_msg, best_block, &&keys_provider, &&logger);
// Now disconnect the two nodes and check that the commitment point in
// Node B's channel_reestablish message is sane.
let per_commitment_secret = SecretKey::from_slice(&hex::decode("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap();
let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
let htlc_basepoint = &chan.holder_signer.pubkeys().htlc_basepoint;
- let keys = TxCreationKeys::derive_new(&secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint).unwrap();
+ let keys = TxCreationKeys::derive_new(&secp_ctx, &per_commitment_point, delayed_payment_base, htlc_basepoint, &counterparty_pubkeys.revocation_basepoint, &counterparty_pubkeys.htlc_basepoint);
macro_rules! test_commitment {
( $counterparty_sig_hex: expr, $sig_hex: expr, $tx_hex: expr, $($remain:tt)* ) => {
let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret);
assert_eq!(per_commitment_point.serialize()[..], hex::decode("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]);
- assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
+ assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).serialize()[..],
hex::decode("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]);
- assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(),
+ assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret),
SecretKey::from_slice(&hex::decode("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap());
- assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..],
+ assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).serialize()[..],
hex::decode("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]);
- assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(),
+ assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret),
SecretKey::from_slice(&hex::decode("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap());
}
projects / rust-lightning / blobdiff