In this commit, we rework how publishTransaction works in order to
correctly handle removing invalid transactions from the wallet's
unconfirmed transaction store. This is crucial as otherwise, invalid
transactions can remain within the wallet and be used for further
transactions, causing a chain of inaccurate transactions.
publishTransaction will now only return an error if the transaction
fails to be broadcast and it has not been previously seen in the
mempool/chain. This is intended in order to provide an easier API to
callers. Any other errors when broadcasting the transaction will cause
it to be removed from the wallet's unconfirmed transaction store to
ensure it maintains an accurate view of the chain.
We do this in order to be able to reuse the new publishTransaction
method within other parts of the wallet in order to consolidate all
error string-matching within one place.
This commit makes nextAddresses add a function to the transactions
OnCommit handler used to update the cache on successful database
transaction commit. Before this we would risk the cache and database of
get out of sync if the database transaction failed or was aborted after
the cache was updated.
This commit adds the method OnCommit to the ReadWriteTx interface,
making it possible to add closures to be executed once the transaction
is commitited. The method Tx is added to the ReadWriteBucket interface,
for getting the bucket's underlying tx.
The bdb implementation is updated to satisfy the interface change.
Recently the Bucket and Tx interfaces were split into Read and ReadWrite
versions. This commit updates the godoc for the bdb interface
implementation to be consistent with this change.
This is done to avoid the birthday rescan to fail if the chain backend
reports a bestheight of 0.
Earlier it could happen that we attempted to sync to the birthday, but
since only the genesis block was available, which would be rejected as
birthday block because of the timestamp, it would fail to find a block
and the sync would fail.
In this commit, we consolidate the existing rollback logic to carry out
its duties under one database transaction.
Co-authored-by: Roei Erez <roeierez@gmail.com>
In this commit, we refactor the wallet's syncing logic with
syncWithChain to use the newer, simpler methods: syncToBirthday and
recovery. Along the way, we also fix a bug within the wallet where it
was possible to sync past the birthday, but not sync to tip completely
and restart, which would lead to us starting a rescan from the latest
synced height, rather than from the birthday stamp.
This commit slightly changes the wallet's syncing behavior to the
following:
1. Ensure the wallet is synced to its birthday.
2. Perform a recovery if requested.
3. Check for chain reorgs.
4. Dispatch a rescan from the current synced height.
Co-authored-by: Roei Erez <roeierez@gmail.com>
In this commit, we add a new recovery method to the wallet. This method
attempts to recover any unspent outputs which pay to any of the wallet's
addresses. Most of the logic found within it is heavily borrowed from
the existing syncWithChain method. This method is currently unused, but
it will end up replacing some of the existing sync logic in a later
commit.
In this commit, we add a new syncToBirthday method to the wallet. This
method intends to sync the wallet's point of the view of the chain until
finding its birthday. Most of the logic found within it is heavily
borrowed from the existing syncWithChain method. This method is
currently unused, but it will end up replacing some of the existing sync
logic in a later commit.
Co-authored-by: Roei Erez <roeierez@gmail.com>
In this commit, we extend the BitcoindClient to properly detect the
spend of an arbitrary script on-chain. This is possible by looking at a
transaction's input and re-deriving the PkScript, from its signature
script/witness, of the output it's attempting to spend. Upon detecting
the spend, a chain.RelevantTx will be dispatched.
In this commit, we modify the dropwtxmgr tool to force a rescan upon
restart from the wallet's birthday block, rather than the chain's
genesis block. We can safely do this as we expect that no on-chain
events relevant to the wallet should happen before this block. For
older wallets which do not have their birthday block set, the rescan
should start from the genesis block.
In this commit, we address an issue that would cause users to be stuck
in an infinite loop by fetching the same candidate birthday block due to
its height not being updated if the sanity check was attempting to fix
an estimate in the future. We fix this by setting the new candidate
height so that new candidate blocks can be fetched and tested.
In this commit, we remove the wallet dependency from the
birthdaySanityCheck function. Every interaction with the wallet is now
backed by two interfaces, birthdayStore and chainConn. These interfaces
will allow us to increase the test coverage of the birthdaySanityCheck
as now we'll only need to mock out only the necessary functionality.
In this commit, we prevent any further sanity check attempts by the
wallet if its correctness has previously been verified. We do this to
ensure we don't unnecessarily attempt to find a new candidate.
In this commit, we add a new key/value pair to the waddrmgr's sync
bucket to store the verification status of the birthday block. This
verification status determines whether the wallet has verified the
correctness of its birthday block through its sanity check on startup.
In this commit, we address an issue with the wallet where it would
always request a rescan from the birthday block. This is very crucial
for older wallets, as it'll potentially go through thousands of blocks.
To address this, we'll now only request a rescan from our birthday if
we're recovering our wallet from our seed, the birthday block was rolled
back, or if we're performing our initial sync. Otherwise, we'll request
a rescan from tip.
