- let remote_commit_tx_fee_msat = if self.context.is_outbound() { 0 } else {
- let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
- self.context.next_remote_commit_tx_fee_msat(htlc_candidate, None) // Don't include the extra fee spike buffer HTLC in calculations
- };
- if pending_remote_value_msat - msg.amount_msat < remote_commit_tx_fee_msat {
- return Err(ChannelError::Close("Remote HTLC add would not leave enough to pay for fees".to_owned()));
- };
-
- if pending_remote_value_msat - msg.amount_msat - remote_commit_tx_fee_msat < self.context.holder_selected_channel_reserve_satoshis * 1000 {
- return Err(ChannelError::Close("Remote HTLC add would put them under remote reserve value".to_owned()));
+ {
+ let remote_commit_tx_fee_msat = if self.context.is_outbound() { 0 } else {
+ let htlc_candidate = HTLCCandidate::new(msg.amount_msat, HTLCInitiator::RemoteOffered);
+ self.context.next_remote_commit_tx_fee_msat(htlc_candidate, None) // Don't include the extra fee spike buffer HTLC in calculations
+ };
+ let anchor_outputs_value_msat = if !self.context.is_outbound() && self.context.get_channel_type().supports_anchors_zero_fee_htlc_tx() {
+ ANCHOR_OUTPUT_VALUE_SATOSHI * 2 * 1000
+ } else {
+ 0
+ };
+ if pending_remote_value_msat.saturating_sub(msg.amount_msat).saturating_sub(anchor_outputs_value_msat) < remote_commit_tx_fee_msat {
+ return Err(ChannelError::Close("Remote HTLC add would not leave enough to pay for fees".to_owned()));
+ };
+ if pending_remote_value_msat.saturating_sub(msg.amount_msat).saturating_sub(remote_commit_tx_fee_msat).saturating_sub(anchor_outputs_value_msat) < self.context.holder_selected_channel_reserve_satoshis * 1000 {
+ return Err(ChannelError::Close("Remote HTLC add would put them under remote reserve value".to_owned()));
+ }