+ let mut outbound_scid_aliases = HashSet::new();
+ for (chan_id, chan) in by_id.iter_mut() {
+ if chan.outbound_scid_alias() == 0 {
+ let mut outbound_scid_alias;
+ loop {
+ outbound_scid_alias = fake_scid::Namespace::OutboundAlias
+ .get_fake_scid(best_block_height, &genesis_hash, fake_scid_rand_bytes.as_ref().unwrap(), &args.keys_manager);
+ if outbound_scid_aliases.insert(outbound_scid_alias) { break; }
+ }
+ chan.set_outbound_scid_alias(outbound_scid_alias);
+ } else if !outbound_scid_aliases.insert(chan.outbound_scid_alias()) {
+ // Note that in rare cases its possible to hit this while reading an older
+ // channel if we just happened to pick a colliding outbound alias above.
+ log_error!(args.logger, "Got duplicate outbound SCID alias; {}", chan.outbound_scid_alias());
+ return Err(DecodeError::InvalidValue);
+ }
+ if chan.is_usable() {
+ if short_to_id.insert(chan.outbound_scid_alias(), *chan_id).is_some() {
+ // Note that in rare cases its possible to hit this while reading an older
+ // channel if we just happened to pick a colliding outbound alias above.
+ log_error!(args.logger, "Got duplicate outbound SCID alias; {}", chan.outbound_scid_alias());
+ return Err(DecodeError::InvalidValue);
+ }
+ }
+ }
+