#[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> {
//TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we
//may see payments to it!
return Err(ChannelError::Close("Peer sent a loose channel_reestablish not after reconnect"));
}
- if msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER {
+ if msg.next_local_commitment_number >= INITIAL_COMMITMENT_NUMBER || msg.next_remote_commitment_number >= INITIAL_COMMITMENT_NUMBER ||
+ msg.next_local_commitment_number == 0 {
return Err(ChannelError::Close("Peer sent a garbage channel_reestablish"));
}
})
} else { None };
- if self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) == ChannelState::FundingSent as u32 {
- // Short circuit the whole handler as there is nothing we can resend them
- return Ok((None, None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
- }
-
- if msg.next_local_commitment_number == 0 || msg.next_remote_commitment_number == 0 {
- if self.channel_state & (ChannelState::FundingSent as u32) != ChannelState::FundingSent as u32 {
- return Err(ChannelError::Close("Peer sent a pre-funding channel_reestablish after we exchanged funding_locked"));
+ if self.channel_state & (ChannelState::FundingSent as u32) == ChannelState::FundingSent as u32 {
+ if self.channel_state & ChannelState::OurFundingLocked as u32 == 0 {
+ if msg.next_remote_commitment_number != 0 {
+ return Err(ChannelError::Close("Peer claimed they saw a revoke_and_ack but we haven't sent funding_locked yet"));
+ }
+ // Short circuit the whole handler as there is nothing we can resend them
+ return Ok((None, None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
}
+
// We have OurFundingLocked set!
let next_per_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number);
let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret);
}), None, None, None, RAACommitmentOrder::CommitmentFirst, shutdown_msg));
}
- let required_revoke = if msg.next_remote_commitment_number == INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
+ let required_revoke = if msg.next_remote_commitment_number + 1 == INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number {
// Remote isn't waiting on any RevokeAndACK from us!
// Note that if we need to repeat our FundingLocked we'll do that in the next if block.
None
- } else if msg.next_remote_commitment_number == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_local_commitment_transaction_number {
+ } else if msg.next_remote_commitment_number + 1 == (INITIAL_COMMITMENT_NUMBER - 1) - self.cur_local_commitment_transaction_number {
if self.channel_state & (ChannelState::MonitorUpdateFailed as u32) != 0 {
self.monitor_pending_revoke_and_ack = true;
None
fn maybe_propose_first_closing_signed(&mut self, fee_estimator: &FeeEstimator) -> Option<msgs::ClosingSigned> {
if !self.channel_outbound || !self.pending_inbound_htlcs.is_empty() || !self.pending_outbound_htlcs.is_empty() ||
self.channel_state & (BOTH_SIDES_SHUTDOWN_MASK | ChannelState::AwaitingRemoteRevoke as u32) != BOTH_SIDES_SHUTDOWN_MASK ||
- self.last_sent_closing_fee.is_some() ||
- self.cur_remote_commitment_transaction_number != self.cur_local_commitment_transaction_number{
+ self.last_sent_closing_fee.is_some() || self.pending_update_fee.is_some() {
return None;
}
}
}
+ /// If an Err is returned, it is a ChannelError::Close (for get_outbound_funding_created)
fn get_outbound_funding_created_signature(&mut self) -> Result<(Signature, Transaction), ChannelError> {
let funding_script = self.get_funding_redeemscript();
/// or if called on an inbound channel.
/// Note that channel_id changes during this call!
/// Do NOT broadcast the funding transaction until after a successful funding_signed call!
+ /// If an Err is returned, it is a ChannelError::Close.
pub fn get_outbound_funding_created(&mut self, funding_txo: OutPoint) -> Result<(msgs::FundingCreated, ChannelMonitor), ChannelError> {
if !self.channel_outbound {
panic!("Tried to create outbound funding_created message on an inbound channel!");
/// self.remove_uncommitted_htlcs_and_mark_paused()'d
pub fn get_channel_reestablish(&self) -> msgs::ChannelReestablish {
assert_eq!(self.channel_state & ChannelState::PeerDisconnected as u32, ChannelState::PeerDisconnected as u32);
+ assert_ne!(self.cur_remote_commitment_transaction_number, INITIAL_COMMITMENT_NUMBER);
msgs::ChannelReestablish {
channel_id: self.channel_id(),
+ // The protocol has two different commitment number concepts - the "commitment
+ // transaction number", which starts from 0 and counts up, and the "revocation key
+ // index" which starts at INITIAL_COMMITMENT_NUMBER and counts down. We track
+ // commitment transaction numbers by the index which will be used to reveal the
+ // revocation key for that commitment transaction, which means we have to convert them
+ // to protocol-level commitment numbers here...
+
+ // next_local_commitment_number is the next commitment_signed number we expect to
+ // receive (indicating if they need to resend one that we missed).
next_local_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_local_commitment_transaction_number,
- next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number -
- if self.channel_state & (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) == (ChannelState::FundingSent as u32) { 1 } else { 0 },
+ // We have to set next_remote_commitment_number to the next revoke_and_ack we expect to
+ // receive, however we track it by the next commitment number for a remote transaction
+ // (which is one further, as they always revoke previous commitment transaction, not
+ // the one we send) so we have to decrement by 1. Note that if
+ // cur_remote_commitment_transaction_number is INITIAL_COMMITMENT_NUMBER we will have
+ // dropped this channel on disconnect as it hasn't yet reached FundingSent so we can't
+ // overflow here.
+ next_remote_commitment_number: INITIAL_COMMITMENT_NUMBER - self.cur_remote_commitment_transaction_number - 1,
data_loss_protect: None,
}
}
}
fn get_channel_keys(&self, _inbound: bool) -> ChannelKeys { self.chan_keys.clone() }
+ fn get_session_key(&self) -> SecretKey { panic!(); }
}
#[test]
projects / rust-lightning / blobdiff