fn check_remote_fee<F: Deref>(fee_estimator: &F, feerate_per_kw: u32) -> Result<(), ChannelError>
where F::Target: FeeEstimator
{
- let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
- // Some fee estimators round up to the next full sat/vbyte (ie 250 sats per kw), causing
- // occasional issues with feerate disagreements between an initiator that wants a feerate
- // of 1.1 sat/vbyte and a receiver that wants 1.1 rounded up to 2. Thus, we always add 250
- // sat/kw before the comparison here.
- if feerate_per_kw + 250 < lower_limit {
- return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {} (- 250)", feerate_per_kw, lower_limit)));
- }
// We only bound the fee updates on the upper side to prevent completely absurd feerates,
// always accepting up to 25 sat/vByte or 10x our fee estimator's "High Priority" fee.
// We generally don't care too much if they set the feerate to something very high, but it
if feerate_per_kw as u64 > upper_limit {
return Err(ChannelError::Close(format!("Peer's feerate much too high. Actual: {}. Our expected upper limit: {}", feerate_per_kw, upper_limit)));
}
+ let lower_limit = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
+ // Some fee estimators round up to the next full sat/vbyte (ie 250 sats per kw), causing
+ // occasional issues with feerate disagreements between an initiator that wants a feerate
+ // of 1.1 sat/vbyte and a receiver that wants 1.1 rounded up to 2. Thus, we always add 250
+ // sat/kw before the comparison here.
+ if feerate_per_kw + 250 < lower_limit {
+ return Err(ChannelError::Close(format!("Peer's feerate much too low. Actual: {}. Our expected lower limit: {} (- 250)", feerate_per_kw, lower_limit)));
+ }
Ok(())
}
log_info!(logger, "Received funding_locked from peer for channel {}", log_bytes!(self.channel_id()));
- Ok(self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height()).ok())
+ Ok(self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height(), logger))
}
/// Returns transaction if there is pending funding transaction that is yet to broadcast
})
} else { None };
- let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block_height).ok();
+ let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block_height, logger);
let mut accepted_htlcs = Vec::new();
mem::swap(&mut accepted_htlcs, &mut self.monitor_pending_forwards);
})
} else { None };
- let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height()).ok();
+ let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, best_block.height(), logger);
if self.channel_state & (ChannelState::FundingSent as u32) == ChannelState::FundingSent as u32 {
// If we're waiting on a monitor update, we shouldn't re-send any funding_locked's.
txdata: &TransactionData, genesis_block_hash: BlockHash, node_pk: PublicKey, logger: &L)
-> Result<(Option<msgs::FundingLocked>, Option<msgs::AnnouncementSignatures>), ClosureReason> where L::Target: Logger {
let non_shutdown_state = self.channel_state & (!MULTI_STATE_FLAGS);
- for &(index_in_block, tx) in txdata.iter() {
- if let Some(funding_txo) = self.get_funding_txo() {
+ if let Some(funding_txo) = self.get_funding_txo() {
+ for &(index_in_block, tx) in txdata.iter() {
// If we haven't yet sent a funding_locked, but are in FundingSent (ignoring
// whether they've sent a funding_locked or not), check if we should send one.
if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
// may have already happened for this block).
if let Some(funding_locked) = self.check_get_funding_locked(height) {
log_info!(logger, "Sending a funding_locked to our peer for channel {}", log_bytes!(self.channel_id));
- let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, height).ok();
+ let announcement_sigs = self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger);
return Ok((Some(funding_locked), announcement_sigs));
}
}
if let Some(funding_locked) = self.check_get_funding_locked(height) {
let announcement_sigs = if let Some((genesis_block_hash, node_pk)) = genesis_node_pk {
- self.get_announcement_sigs(node_pk, genesis_block_hash, height).ok()
+ self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger)
} else { None };
log_info!(logger, "Sending a funding_locked to our peer for channel {}", log_bytes!(self.channel_id));
return Ok((Some(funding_locked), timed_out_htlcs, announcement_sigs));
}
let announcement_sigs = if let Some((genesis_block_hash, node_pk)) = genesis_node_pk {
- self.get_announcement_sigs(node_pk, genesis_block_hash, height).ok()
+ self.get_announcement_sigs(node_pk, genesis_block_hash, height, logger)
} else { None };
Ok((None, timed_out_htlcs, announcement_sigs))
}
/// Gets an UnsignedChannelAnnouncement for this channel. The channel must be publicly
/// announceable and available for use (have exchanged FundingLocked messages in both
- /// directions). Should be used for both loose and in response to an AnnouncementSignatures
- /// message from the remote peer.
+ /// directions). Should be used for both broadcasted announcements and in response to an
+ /// AnnouncementSignatures message from the remote peer.
///
/// Will only fail if we're not in a state where channel_announcement may be sent (including
/// closing).
///
- /// Note that the "channel must be funded" requirement is stricter than BOLT 7 requires - see
- /// https://github.com/lightningnetwork/lightning-rfc/issues/468
- ///
/// This will only return ChannelError::Ignore upon failure.
fn get_channel_announcement(&self, node_id: PublicKey, chain_hash: BlockHash) -> Result<msgs::UnsignedChannelAnnouncement, ChannelError> {
if !self.config.announced_channel {
Ok(msg)
}
- fn get_announcement_sigs(&mut self, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block_height: u32) -> Result<msgs::AnnouncementSignatures, ChannelError> {
+ fn get_announcement_sigs<L: Deref>(&mut self, node_pk: PublicKey, genesis_block_hash: BlockHash, best_block_height: u32, logger: &L)
+ -> Option<msgs::AnnouncementSignatures> where L::Target: Logger {
if self.funding_tx_confirmation_height == 0 || self.funding_tx_confirmation_height + 5 > best_block_height {
- return Err(ChannelError::Ignore("Funding not yet fully confirmed".to_owned()));
+ return None;
}
if !self.is_usable() {
- return Err(ChannelError::Ignore("Channel not yet available for use".to_owned()));
+ return None;
}
if self.channel_state & ChannelState::PeerDisconnected as u32 != 0 {
- return Err(ChannelError::Ignore("Peer currently disconnected".to_owned()));
+ log_trace!(logger, "Cannot create an announcement_signatures as our peer is disconnected");
+ return None;
}
if self.announcement_sigs_state != AnnouncementSigsState::NotSent {
- return Err(ChannelError::Ignore("Announcement signatures already sent".to_owned()));
+ return None;
}
- let announcement = self.get_channel_announcement(node_pk, genesis_block_hash)?;
- let (our_node_sig, our_bitcoin_sig) = self.holder_signer.sign_channel_announcement(&announcement, &self.secp_ctx)
- .map_err(|_| ChannelError::Ignore("Signer rejected channel_announcement".to_owned()))?;
+ log_trace!(logger, "Creating an announcement_signatures message for channel {}", log_bytes!(self.channel_id()));
+ let announcement = match self.get_channel_announcement(node_pk, genesis_block_hash) {
+ Ok(a) => a,
+ Err(_) => {
+ log_trace!(logger, "Cannot create an announcement_signatures as channel is not public.");
+ return None;
+ }
+ };
+ let (our_node_sig, our_bitcoin_sig) = match self.holder_signer.sign_channel_announcement(&announcement, &self.secp_ctx) {
+ Err(_) => {
+ log_error!(logger, "Signer rejected channel_announcement signing. Channel will not be announced!");
+ return None;
+ },
+ Ok(v) => v
+ };
self.announcement_sigs_state = AnnouncementSigsState::MessageSent;
- Ok(msgs::AnnouncementSignatures {
+ Some(msgs::AnnouncementSignatures {
channel_id: self.channel_id(),
short_channel_id: self.get_short_channel_id().unwrap(),
node_signature: our_node_sig,
"MAX_FUNDING_SATOSHIS is greater than all satoshis in existence");
}
+ #[test]
+ fn test_no_fee_check_overflow() {
+ // Previously, calling `check_remote_fee` with a fee of 0xffffffff would overflow in
+ // arithmetic, causing a panic with debug assertions enabled.
+ assert!(Channel::<InMemorySigner>::check_remote_fee(&&TestFeeEstimator { fee_est: 42 }, u32::max_value()).is_err());
+ }
+
struct Keys {
signer: InMemorySigner,
}
projects / rust-lightning / blobdiff