This change adds additional http listeners for websocket connections
on "/wallet". Websockets are used to provide asynchronous messaging
between wallet daemons (i.e. btcwallet) and btcd as they allow an easy
way for btcd to provide instant notifications (instead of a wallet
polling for updates) and multiple replies to a single request.
Standard RPC commands sent over a websocket connection are handled
just like RPC, returning the same results, the only difference being
that the connection is async. In cases where the standard RPC
commands fall short of wallet daemons requests, and to request
notifications for addresses and events, extension JSON methods are
used.
Multiple wallets can be connected to the same btcd, and replies to
websocket requests and notifications are properly routed back to the
original requesting wallet.
Due to the nature of turning a synchronous protocol asynchronous, it
is highly recommended to use the JSON id field as a type of sequence
number, so replies from btcd can be routed back to the proper handler
in a wallet daemon.
The idea here is that interface_test.go will be directly usable in each
implementation to increase test coverage there as well, but also works at
the top-most level to test arbitrary backends.
This is simply at start at providing generic interface tests. The only
thing is tests so far is the empty database conditions on NewestSha, but
it adds infrastructure for creating and opening databases with special
type handling based on the database and necessary logic to teardown so
multiple backends can be tested simultaneously.
This and the next series of commits all discussed with drahn@.
This also adds tests to verify that the created error string follows
the expected format of "code: message" and tests to verify that Error
can be used as an error. Additionally, the idiom
var _, _ error = Error{}, &Error{}
was added so the build will fail if the builtin error interface is
never satisified in the future.
Rather than fetching the hash of each block individually 2k+ times, make
use of the FetchHeightRange function so all of the most recent hashes can
be fetched at once.
This commit modifies the code to make use of the new btcd APIs that allow
fetching of transaction lists which either do or do not include fully
spent transactions. It is more efficient to avoid fetching fully spent
transactions from the database when they aren't needed.
This commit modifies the errors that result from missing expected input
transactions to a RuleError. This allows the caller to detect a block was
rejected due to a rule violation as opposed to an unexpected error.
This commit modifies the address manager save code to exit when there is
an error creating the file used to store addresses. Previously the error
was only logged leaving the invalid file handle to be used later.
This commit adds code to properly respond to getdata requests for
transactions by fetching them from the transaction pool. Previously, we
advertised newly available transactions, but the code to respond with the
actual transaction was not written yet.
Also, fix a couple of comments and make the pushTxMsg and pushBlockMsg
functions consistent.
This commit adds a quick check to the transaction store fetch code which
simply returns an empty store if no hashes were requested rather than
bothering the db with an empty list.
This commit is a first pass at improving the logging. It changes a number
of things to improve the readability of the output. The biggest addition
is message summaries for each message type when using the debug logging
level.
There is sitll more to do here such as allowing the level of each
subsystem to be independently specified, syslog support, and allowing the
logging level to be changed run-time.
This commit modifies the transaction lookup code to use a set instead of a
slice (list). This allows the lookup to automatically prevent duplicate
requests to the database.
Previously, the code simply added every referenced transaction to a list
without checking for duplicates, which led to multiple requests against
the database for the same transaction. It also meant the request list
could grow quite large with all of the duplicates using far more memory
than required.
While the end result was accurate, operating that way is not as efficient
as only requesting unique transactions.
This commit provides a new flag, --nocheckpoints, to disable built-in
checkpoints.
Checkpoints are used for a number of things such a ensuring
the block chain being downloaded matches various known good blocks,
allowing quicker verification on old blocks since scripts don't have to be
executed, and preventing forks from old blocks, etc.
