This commit adds a new function named NewBlockTemplate along with
supporting infrastructure which is part of the core functionality needed
to support mining.
In particular the function creates a new block template which contains a
fully populated block with a zero nonce that is ready to be solved as well
as additional information regarding the fees and number of signature
operations for each transaction included in the block. The specific
transaction selection logic mirrors the reference implementation.
Various cleanup, optimizations, and comment suggestions provided by
@owainga. Also contains some naming suggestions and comment fixes from
@flammit.
This change adds select statements to each channel write that may
occur from a non-RPCS goroutine to unblock once the server has begun
shutting down. This prevents issues in clean shutdown where non-RPCS
goroutines may block indefinitely on message sends to the RPC server.
This change adds rescan fast paths for all current implementations of
the btcutil.Address interface. Rather than encoding a payment address
string from a txout script, the minimum number of bytes (which depends
on the address type) are copied into a stack array and used as a
lookup key to a map exclusive for that address type. This performs
better than the previous implementation due to avoiding the base58
encoding and generating less garbage (so each GC cycle completes
faster).
If the address type switch falls into the default (unhandled) case,
the encoded payment address is used as a fallback. This keeps the
intended rescan behavior even when new implementations of
btcutil.Address are added without a rescan fast path.
Benchmarks indicate that when a fast path is followed, for 20 byte
RIPEMD-160 hashes (such as P2PKH and P2SH), skipping the payment
address encoding (and thus bypassing the base58 encoding code) can
result in map lookups up to 60x faster.
Rather than returning an error when creating the RPC server an it can't
listen on any of the specified interfaces, only error when it can't listen
on all of the specified interfaces.
Rather than updating the new chain state with the hash and height of the
block that was just processed, query the database for the best block.
This is needed because the block that was just processed might be a side
chain block or have caused a reorg.
This commit introduces a chain state that is updated as blocks are
processed into the block chain instance associated with the block manager.
This has been done because btcchain is currently not safe for concurrent
access and the block manager is typically quite busy processing block and
inventory. This approach allows fast access to most chain information in
a concurrent safe fashion.
Rather than doing a lot of if/else in the configuration load for btcctl,
set the default for the RPC server to localhost and the RPC cert to the
btcd cert, then override them as needed depending on the --wallet and
--testnet flags.
The code was not resetting the counters when logging a message, so the
stats kept increasing rather than showing the number of items processed
since the last log message.
This has been resolved by copying the log function directly from btcd and
modifying it slightly to work with the importer.
blockImporter now has these new properties:
txProcessed - number of transactions processed by the importer
lastHeight - height of the last imported block
lastBlockTime - block time of the last imported block
lastLogTime - last timestamp of when a progress message was shown
the p/progress option in addblocks now indicates how often you want the progress message to appear
This commit removes the word "only" from the non-standard transaction
error message when the number of items on the stack does not match the
number of expected items.
This was suggested by @mbelshe.
This commit updates the install command under the Installation section in
README.md to include all subdirectories thereby including the utilities
such as addblock and btcctl.
Rather than having a separate query channel for the block manager, use the
same channel so the block handler acts as a pure FIFO queue. This
prevents possible starvation of query related messages.
ok @owainga
This change modifies the RPC server's notifiation manager from a
struct with requests, protected by a mutux, to two goroutines. The
first maintains a queue of all notifications and control requests
(registering/unregistering notifications), while the second reads from
the queue and processes notifications and requests one at a time.
Previously, to prevent slowing down block and mempool processing, each
notification would be handled by spawning a new goroutine. This lead
to cases where notifications would end up being sent to clients in a
different order than they were created. Adding a queue keeps the
order of notifications originating from the same goroutine, while also
not slowing down processing while waiting for notifications to be
processed and sent.
ok @davecgh
This mirrors a recent change in the reference implementation. Since the
vast majority of the network still uses it and transactions which aren't
considered standard won't be relayed, the rules for standard transactions
need to be kept consistent.
Ideally this should be handled via floating fees, but we're rather limited
until we have miner support and a larger network share so the probability
of a transaction being relayed and confirmed is high.
Closes#100.
ok @owainga
This commit simply alphabetizes the subsystem logger variables, map, and
use switch so the order in the code is consistent with the sorted output
displayed when using --debuglevel.
The debuglevel parameter has accepted subsystems in additional to an
overall level for quite some time, but the sample config file was not
updated to reflect that.
This commit updates the sample config file accordingly.
This commit changes the websocket client code to use a mutex for
disconnect since it's theoretically possible a non-blocking select on the
quit channel could fall through from two different goroutines thus causing
a second call to close.
ok @jrick.
This change improves the mechanism by which btcd notifies a websocket
client of transaction relating to watched address and unspent outputs
in the following ways:
1. The old processedtx notification has been replaced with the new
recvtx notification. This notification, rather than parsing out
details used by wallet clients, sends the serialized transaction
(as hexadecimal) and any block details (if mined) if any transaction
output sends to one of the websocket client's watched addresses.
2. The old txspent notification has been replaced with the new
redeemingtx notification. This notification, rather than parsing
out details used by wallet clients, sends the serialized transaction
(as hexadecimal) and any block details (if mined) if any transaction
input spends a watched output.
3. When processing notifications for transaction outputs, if any output
spends to a client's watched address, a corresponding spent request
is automatically registered.
4. Transaction notifications originating from mempool now include both
transaction inputs and outputs, rather than only processing
5. When processing notifications for transaction inputs, a client's
output spent request is only removed if the transaction being
processed has also been mined into a block. In combination with the
4th change, this results in two redeemingtx notifications for
transactions which first appear in mempool and are subsequently mined
into a block.
This changes the implementation of the sendrawtransaction RPC handler
to match bitcoind behavior by always returning a rejection error for
any error processing or accepting the tx by the mempool. Previously,
if the tx was rejected for a rule error rather than an actual failure,
a client would still receive the tx sha as a result with no error.
