This change removes the three separate mutexes which used to lock an
account's wallet, tx store, and utxo store. Accounts no longer
contain any locking mechanism and rely on go's other synchronization
constructs (goroutines and channels) for correct access.
All accounts are now managed as a collection through the new
AccountManager, rather than the old AccountStore. AccountManager runs
as its own goroutine to provide access to accounts.
RPC requests are now queued for handling, being denied if the queue
buffer is exhausted. Notifications are also queued (instead of being
sent from their own goroutine after being received, in which order is
undefined), however, notifications are never dropped and will
potentially grow a queue of infinite size if unhandled.
Fixes several hangs cased by incorrect locking, by removing the
locking. Instead, a single goroutine manages all file writes.
The old account 'dirty' boolean flags have been removed. Instead,
anytime an account structure is modified, the portion that was
modified (wallet, tx store, or utxo store) must be scheduled to be
written.
Now that it has been decided that all account wallets will share the
same passphrase, the walletlock and walletpassphrase RPC handlers now
go through the accountstore to lock or unlock all account wallets,
rather than only changing the default account.
There were several places where various account files (wallet, tx, or
utxo stores) were being marked as dirty, and then not being either
immediately synced to disk or marked as a dirty account so they would
be scheduled to be synced to disk. This change adds Account functions
to mark as dirty and add the account to the map of scheduled accounts
so they won't be missed by the disk syncer goroutine.
This change allows for the use of watching-only wallets. Unlike
normal, "hot" wallets, watching-only wallets do not contain any
private keys, and can be used in situations where you want to keep one
wallet online to create new receiving addresses and watch for received
transactions, while keeping the hot wallet offline (possibly on an
air-gapped computer).
Two (websocket) extension RPC calls have been added:
First, exportwatchingwallet, which will export the current hot wallet
to a watching-only wallet, saving either to disk or returning the
base64-encoded wallet files to the caller.
Second, recoveraddresses, which is used to recover the next n
addresses from the address chain. This is used to "sync" a watching
wallet with the hot wallet, or vice versa.
This change introduces a new function to export a wallet in memory to
a watching wallet. Watching wallets allow to watch for balance
changes and transactions to wallet addresses while only storing the
public parts of a wallet (no private keys). New addresses created by
the watching wallet will use pubkey address chaining and will allow to
receive funds to an indefinite number of new addresses, and create the
private keys for said addresses from the non-watching wallet later.
The actual exporting of a watching wallet to a file (triggered by an
RPC request) is not yet implemented.
While here, fix an issue found by new test code for the chained
address code which incorrectly set the starting index of addresses in
the chain needing private keys to be created.
When disk syncing a wallet file, if the wallet is flagged dirty, the
disk syncer must grab the wallet writer lock to set dirty=false. The
disk syncing code was being called in the end of
(*Account).RescanActiveAddresses with the reader lock held (unlocked
using a defer), which prevented the writer lock from being aquired.
This change removes the defered unlock to release the reader lock
before syncing to disk.
This change greatly cleans up the RPC connection between btcwallet and
btcd. Proper (JSON-RPC spec-following) notifications are now expected
rather than Responses with a non-empty IDs.
A new RPCConn interface type has also been introduced with a
BtcdRPCConn concrete type for btcd RPC connections. Non-btcd-specific
code handles the RPCConn, while the btcd details have been abstracted
away to a handful of functions. This will make it easier to write
tests by creating a new fake RPC connection with hardcoded expected
replies.
This change saves (at most) the last 20 block hashes to disk. Upon
btcd connect, in the handshake, btcwallet checks whether btcd's best
chain still contains these blocks, starting from the most recently
added block and continuing until the earliest saved. If any blocks
are missing, Tx history and UTXOs from any blocks no longer in the
chain are removed, and a rescan is started from after the best block
still in the main chain.
If all previous block hashes are exhausted (either due to a large
reorg, or because not enough blocks have been seen), a full rescan is
triggered (full meaning from the earliest block that matters to this
wallet) since the last synced up to point is no longer available.
The previous 20 seen block hashes are saved to the wallet file, which
required bumping the file version. Older wallets written with lesser
versions will use the previous reading function, making this change
backwards compatible.
This changes the locations that account files (wallet.bin, utxo.bin,
and tx.bin) are searched for when opening or disk syncing accounts.
Previously, files were saved in the following layout:
~/.btcwallet/
- btcwallet/
- wallet.bin
- tx.bin
- utxo.bin
- btcwallet-AccountA/
- wallet.bin
- tx.bin
- utxo.bin
This format had two issues. First, each account would require its own
directory, causing a scalability issue on unix (and perhaps other)
platforms. Second, there was no distinction between testnet and
mainnet wallets, and if mainnet support was enabled, btcwallet would
attempt to open accounts with testnet wallets.
Instead, the following file structure is now used:
~/.btcwallet/
- testnet/
- wallet.bin
- tx.bin
- utxo.bin
- AccountA-wallet.bin
- AccountA-tx.bin
- AccountA-utxo.bin
This solves both of the previously-mentioned issues by requiring only
two subdirectories (one each for the testnet and mainnet bitcoin
networks), and by separating the locations to open and save testnet
and mainnet account files.
At startup, a check for the old account file structure is performed.
If found, files are moved to the new locations, and the old account
directories are removed. Account files are moved to the testnet
directory, as only testnet support is currently enabled.
The version has been bumped to 0.1.1 to reflect this change.
Fixes#16.
This change adds an additional check when creating a new wallet or
extending the keypool. All public and private keypairs are parsed
from their serialized forms, and an ecdsa signature is created and
verified using the keypairs. If the verifiction fails at any point,
the wallet creation or keypool extension is aborted to prevent any
errors where an address is returned to a user, but any funds send to
that address are unspendable due to a mismatched keypair.
This change adds a new websocket extension command,
listalltransaction, which works just like listtransactions except it
does not take the count or from optional args, and will return an
array of all transaction details. Notifications for newly-added
transactions are now sent to frontends as well, using the newtx
notification.
No support for updating tx details or removing failed txs is
implemented yet, and will be when cleanly failing a tx send is
implemented later.
This change better organizes account handling by creating a new
AccountStore type and accountstore global variable, with receiver
funcs for all operations that require all accounts. More Account
funcs are also added to clean up account handling in the RPC code.
Intial work on this done by dhill.
This change adds support for the listtransactions RPC command. To
properly reply to this command, additonal information about received
transactions was added, and is now saved in an account's tx.bin file.
Additionally, when sending a transaction, a *tx.SendTx is now saved to
the Tx store, and is included in listtransactions replies under the
"send" category.
WARNING: All account's tx.bin and utxo.bin files should be removed
before running with this change, or else the files may not be read
correctly. Removing tx.bin is not an issue as it was not being used
before, and was being saved with incorrect data. Removing utxo.bin is
not an issue as it will just trigger a rescan on next start. File
format versions are now included in both files, so automatic updates
from previous file formats will be possible with future changes.
Fixes#12.
This adds the necessary bits for handling importing addresses for the
wallet file format, as well as implementing the importprivkey and
dumpprivkey RPC requests.
Initial code by dhill.
