The commit being reverted resulted in the discovery of a bug in which
change addresses could at times be created outside of the default key
scopes, causing us to not properly determine their spends.
Previously, the wallet would determine the key scope to use for change
addresses by locating the one compatible with P2WPKH addresses, but this
wasn't always safe like in the case when multiple key scopes that
supported these addresses existed within the address manager, leading
the change address to be created outside of the intended key scope.
Normally the wallet doesn't wait for the chain backend to be synced
on regtest/simnet because there we cannot be certain if we are at
the chain tip, as there are no other nodes to compare to. For
Neutrino, this is a bit different because we rely on the cfheader
server to tell us what it thinks the chain tip is. For a wallet
recovery on Neutrino we therefore need to make sure we are at least
synced up to what the server thinks is the tip.
It was discovered that the wallet can scan the chain for unnecessary
additional addresses that are derived by higher-level applications using
custom key scopes. This isn't much of an issue for full nodes, but it
can cause light clients to scan more than what's required, triggering
more false positive matches which lead to block retrieval.
Now, we'll only scan the chain for addresses that exist within the
default key scopes, as those are the only ones the wallet should be
concerned about.
In this commit, we add a new package-level function to emulate the
existing Batch interface for bbolt. We do this via a new super-set
interface which is then checked against in the main implementation of
the Batch method.
In this commit, we update our `go list` command to account for the
changes to the output of the command when modules are active. If modules
are active, then any packages which are themselves a sub-module won't
properly be listed.
In this commit, we add the trio of sequence based methods that bbolt
ships with to the main bucket interface. We do this in order to easily
allow walletdb as is to be slotted into place where bbolt is currently
used, without sacrificing any functionality.
`bitcoind` notifies transactions once they're accepted into the mempool
and once they're confirmed in a block. Previously, reading a message
from ZMQ would allocate a buffer with the size of the message. This can
cause nodes to perform a large number of allocations within a small
amount periodically (3000 300B allocations every 10 mins on average),
which can cause a lot of GC pressure on lower resourced nodes. To remedy
this, we introduce two static buffers, one for blocks and another for
transactions, that will be reused for every message read. Each is
constrained by its maximum expected size.
Previously, inserting a transaction as unconfirmed into the store and
later confirming it would leave a lingering unconfirmed input record.
This was discovered as part of
https://github.com/btcsuite/btcwallet/pull/655. This issue would only
affect the wallet if it tracked spent transaction outputs, which it
doesn't. We aim to resolve it in any case for the sake of internal
consistency.
This test ensures that there aren't any lingering unconfirmed records
for a transaction that existed within the store as unconfirmed before
becoming confirmed. At the moment, this is currently failing due to a
gap when moving a transaction from unconfirmed to confirmed within the
store. This will be resolved in a subsequent commit.
This commit ensures the wallet won't enter an inconsitent state
by checking tx confirmation before adding credit.
Without this fix, In the case the existing transaction is already
confirmed on-chain the flow updates the bucketUnminedCredits but
without adding en entry also to the bucketUnmined resulting in
inconsistent state.
