Previously when deciding whether a UTXO is spent or not, we accept a
height hint as the starting block to look for the spending tx in the
rescan process. When it's already found spent before the rescan starts,
we will update the height hint to be the spent height, only if the
latter is greater. This means if the user-specified hint is greater than
the actual spending height, this UTXO will never be found as spent. We
now fix it by always using the spent height as the hint.
Find and replace all nolint instances refering to the `lll` linter and
replace with `ll` which is the name of our custom version of the `lll`
linter which can be used to ignore log lines during linting.
The next commit will do the configuration of the custom linter and
disable the default one.
This commit changes the order of notifications when a relevant tx is
found in a block and now we will always notify the tx subscribers before
notifying the block, which has implications in the upcoming blockbeat.
When a block notification is subscribed via `RegisterBlockEpochNtfn` and
a confirm or spend is subscribed via `RegisterConfirmationsNtfn` or
`RegisterSpendNtfn`, we would always notify the block first before the
tx, causing the subsystem to think there's no relevant txns found in
this block, while the notifications are sent later. We now fix it by
always sending the txns notifications first, so the subsystem can
receive the txns, process them, then attempt to advance its state based
on the block received.
sweeper
This commit implements a new method, `LookupInputMempoolSpend` to do
lookups in the mempool. This method is useful in the case when we only
want to know whether an input is already been spent in the mempool by
the time we call.
This commit moves the `HeightHintCache` implementation to the
`channeldb` package and inverts the dependency relation between
`chainntnfs` and `channeldb`.
Many packages depend on channeldb for type definitions,
interfaces, etc. `chainntnfs` is an example of that. `chainntnfs`
defines the `SpendHintCache` and `ConfirmHintCache` interfaces but
it also implments them (`HeightHintCache` struct). The implementation
uses logic that should not leak from channeldb (ex: bucket paths).
This makes our code highly coupled + it would not allow us to use any
of these interfaces in a package that is imported by `channeldb`
(circular dependency).
This commit makes sure that no loop variables or other temporary
variables are accessed directly in a goroutine but are instead passed
into the goroutine through a parameter. This makes sure a copy of the
value is put on the stack and is not changed while the outside loop
continues.
In this commit, we add a new option for the existing confirmation
notification system that optionally allows the caller to specify that a
block should be included as well.
The only quirk w/ the implementation here is the neutrino backend:
usually we get filtered blocks, we so need to first fetch the block
again so we can deliver the full block to the notifier. On the notifier
end, it'll only be checking for the transactions we care about, to
sending a full block doesn't affect the correctness.
We also extend the `testBatchConfirmationNotification` test to assert
that a block is only included if the caller specifies it.
This commit was previously split into the following parts to ease
review:
- 2d746f68: replace imports
- 4008f0fd: use ecdsa.Signature
- 849e33d1: remove btcec.S256()
- b8f6ebbd: use v2 library correctly
- fa80bca9: bump go modules
With go 1.17 a change to the build flags was implemented:
https://go.googlesource.com/proposal/+/master/design/draft-gobuild.md
The formatter now automatically adds the forward-compatible build tag
format and the linter checks for them, so we need to include them in our
code.
Depends on btcsuite/btcwallet#757.
Pulls in the updated version of btcwallet and walletdb that have the DB
interface enhanced by their own View() and Update() methods with the
reset callback/closure supported out of the box. That way the global
package-level View() and Update() functions now become pure redirects.
We would establish the connection to the chain backend and start getting
block notifications before we had started the concurrent queues, which
would lead to the OnBlockConnected call being blocked, and a deadlock
(since GetBestBlock would never return).
Instead we make sure to start the queues before establishing the
connection, consuming the notifications right away.
