Accessing a struct through an std::syn::MutexGuard using implicit
dereferencing can confuse the borrow checker. This situation arises when
obtaining mutable references to more than one field of the struct, which
is normally allowed.
https://doc.rust-lang.org/nomicon/borrow-splitting.html
However, when using implicit dereferencing, a mutable reference to the
the entire struct is taken. Thus, attempting to access another field in
this manner will lead to a compilation error.
https://doc.rust-lang.org/error-index.html#E0499
A simple way to avoid this is to first obtain a mutable reference to the
struct using explicit dereferencing.
The Features::new() method is nonsense and doesn't describe what
features were being set - we introduce an empty() and supported()
constructors instead.
The spec is a bit mum on feature endianness, so I suppose it falls
under the "everything is big endian unless otherwise specified"
clause, but we were treating it as little.
This change was made in the flat features BOLT PR, as if a channel
requires some unknown feature bits we should still rumor it, we just
shouldn't route through it.
This merges local and global features into one struct, which is
parameterized by where it appers. The parameterization restricts
which queries can be made and which features can be set, in line
with the latest BOLT 9.
Closes#427.
Simplify interfaces between ChannelMessageHandler and PeerManager,
by switching all ChannelMessageHandler errors to HandleError sent
internally instead of being return. With further refactors in Router
and PeerChannelEncryptor, errors management on the PeerManager-side
won't be splitted between try_potential_handleerror and HandleError
processing.
Inside ChannelManager, we now log MsgHandleErrInternal and send
ErrorAction to PeerManager.
On a high-level, it should allow client using API to be more flexible
by polling events instead of waiting function call returns.
We also update handle_error macro to take channel_state_lock from
caller which should avoid some deadlock potential for some edges
cases.
Filter out IgnoreError in handle_error macro, update test in
consequence.
We now have current-local-tx broadcast ability in channel monitors
directly (for ChannelManager deserialization), so we can just use
that instead of always having the Channel store signed ready-to-go
copies of the latest local commitment transaction.
This is further kinda nice since ChannelMonitor is live and can, eg
broadcast HTLC-Success transactions immediately as they will be
generated at broadcast time instead of in advance.
Finally, this lets us clean up a tiny bit in Channel.
This adds a new fn to ChannelKeys which is called when we generte
a new remote commitment transaction for signing. While it may be
theoretically possible to unwind state updates by disconnecting and
reconnecting as well as making appropriate state machine changes,
the effort required to get it correct likely outweighs the UX cost
of "preflighting" the requests to hardwre wallets.
Instead of having in-memory access to the list of private keys
associated with a channel, we should have a generic API which
allows us to request signing, allowing the user to store private
keys any way they like.
The first step is the (rather mechanical) process of templating
the entire tree of ChannelManager -> Channel impls by the
key-providing type. In a later commit we should expose only public
keys where possible.
Extend test visibility of claim-tracking maps to do so.
Cover both "If 2 claimable-outpoint-spending txn are in 1 block,
clean up properly" and "Clean up claimable_outpoints when
pending_claim_requests is cleaned" fix commits in same patchset.
When claimable_outpoints was introduced in "Move
our_claim_txn_waiting_first_conf to pending_claim_requests", removal
of elements from it (which are just pointers into
pending_claim_requests) was never added.
This resolves an issue where we will never track 2 on-chain events
which are waiting for ANTI_REORG_DELAY at the same height.
This partially reverts and fixes "Move our_claim_txn_waiting_first_conf
to pending_claim_requests".
