addrmgr.GetAddress() had a parameter `class string` originally intended
to support looking up addresses according to some type of filter such as
IPv4, IPv6, and only those which support specific wire.ServiceFlags
(full nodes, nodes that support bloom filters, nodes that support
segwit, etc). But currently the parameter is unused and also has an
inappropriate type `string`.
If it would ever be used, it's easy to add back and should then get an
appropriate type such as something that allows bitflags to be set so
that the caller could request combinations such as peers that support
IPv6, are full nodes, and support bloom filters.
This corrects an issue introduced by commit
e8f63bc295 where a failure to lookup a
hostname could lead to a panic in certain circumstances. An error is
now returned in that case as expected.
This commit modifies the `ConnManager` to use the `net.Add` interface
through the package instead of a plain string to represent and
manipulate addresses. This change makes the package much more general as
users of the package can possibly utilize custom implementations of the
`net.Addr` interface to establish connections.
More precisely, the `ConnReq` struct has been modified to use a net.Addr
instance explicitly, and the `DialFunc` type has also been modified to
take a `net.Addr` directly. This latter change gives functions that
adhere to the `DialFunc` type more flexibility as to exactly how the
connection is established.
Additionally, the `connmgr.Config.GetNewAddress` configuration option
now directly returns a `net.Addr. This change allows the `connmgr` to be
decoupled from all DNS queries which allows callers to preferentially
select more secure methods like performing DNS lookups over a Tor proxy.
This modifies the signatures of all serverPeer callbacks that are
provided as peer.Listeners to use _ for the first parameter name which
ensures the passed peer can't be used within the function and updates
all references to the server peer.
This helps ensure any overridden methods that might be defined on a
serverPeer will be invoked where directly calling methods on the passed
peer would not.
Also, while here, add a comment to the OnFeeFilter function.
This modifies the connection manager to provide support for accepting
inbound connections on a caller-provided set of listeners and notify the
caller via a callback.
This is only the minimum work necessary to get inbound support into the
connection manager. The intention for future commits is to move more
connection-related logic such as limiting the maximum number of overall
connections and banned peer tracking into the connection manager.
This removes the type definitions for the callback functions in favor of
declaring them directly in the Config struct. This is more consistent
with the rest of the code base and is preferred since it means callers
reviewing the documentation don't have to follow another level of
indirection to figure out the signature.
This removes any remaining orphan transactions that were sent by a peer
when it disconnects since it is extremely unlikely that the missing
parents will ever materialize from elsewhere.
This does the minimum work necessary to refactor the CPU miner code into
its own package. The idea is that separating this code into its own
package will improve its testability and ultimately be useful to other
parts of the codebase such as the various tests which currently
effectively have their own stripped-down versions of this code.
The API will certainly need some additional cleanup and changes to make
it more usable outside of the specific circumstances it was originally
designed to support (namely the generate RPC), however it is better to
do that in future commits in order to keep the changeset as small as
possible during this refactor.
Overview of the major changes:
- Create the new package
- Move cpuminer.go -> cpuminer/cpuminer.go
- Update mining logging to use the new cpuminer package logger
- Rename cpuminerConfig to Config (so it's now cpuminer.Config)
- Rename newCPUMiner to New (so it's now cpuminer.New)
- Update all references to the cpuminer to use the package
- Add a skeleton README.md
This corrects a few issues introduced with the connection manager where
the server was not notifying the connection manager when a connection
request is available again.
The cases resolved are:
- Unable to initialize a server peer instance in response to the connection
- Failure to associate the connection with the server peer instance
- Disconnection of a non-persistent outbound peer
It also changes the log message to a debug in the former case because
it's not something that should be shown to the user as an error given
it's not due to anything the user has misconfigured nor is it even
unexpected if an invalid address is provided.
This does the minimum work necessary to refactor the block template
generation code into the mining package. The idea is that separating
this code into the mining package will greatly improve its testability,
allow independent benchmarking and profiling, and open up some
interesting opportunities for future development related to mining.
There are some areas related to policy and other configuration that
could be further refactored, however it is better to do that in future
commits in order to keep the changeset as small as possible during this
refactor.
Overview of the major changes:
- Move mining.go -> mining/mining.go
- Move mining_test.go -> mining/mining_test.go
- Add logger to mining package
- Update the MINR subsystem to use the new mining package logger
- Export CoinbaseFlags from the mining package
- BlkTmplGenerator is now mining.BlkTmplGenerator
- Update all references to the mining code to use the package
This modifies the block template generate for the mining code such that
it takes chain instance and params instead of requiring a fully
initialized blockManager instance.
Also, in preparation for being able to more easily separate the code, it
exposes and makes use of two new functions:
- BestSnapshot which returns the state snapshot from the underlying
chain instance
- TxSource which returns the underlying transaction source
This is a step towards being able to separate the mining code into its
own package. No functional change.
This introduces a cpuminerConfig type which contains the necessary
information to break the direct dependency on the main server instance.
This change is a step towards being able to separate the cpu miner into
its own subpackage. No functional change.
This commit adds a new option to the mempool’s policy configuration
which determines which transaction versions should be accepted as
standard.
The default version set by the policy within the server is 2; this
allows accepting transactions which have version 2 enabled in order to
utilize the new sequence locks feature.
This introduces a new type named BlkTmplGenerator which encapsulates the
various state needed to generate block templates.
This is useful since it means code that needs to generate block
templates can simply accept the generator rather than needing access to
all of the additional state which in turn will ultimately make it easier
to split the mining code into its own package.
This renames the mempool.Config.RelayNonStd option to AcceptNonStd which
more accurately describes its behavior since the mempool was refactored
into a separate package.
The reasoning for this change is that the mempool is not responsible for
relaying transactions (nor should it be). Its job is to maintain a pool
of unmined transactions that are validated according to consensus and
policy configuration options which are then used to provide a source of
transactions that need to be mined.
Instead, it is the server that is responsible for relaying transactions.
While it is true that the current server code currently only relays txns
that were accepted to the mempool, this does not necessarily have to
be the case. It would be entirely possible (and perhaps even a good
idea as something do in the future), to separate the relay policy from
the mempool acceptance policy (and thus indirectly the mining policy).
This commit introduces package connmgr which contains connection
management related functionality.
The following is an overview of the features the package provides:
- Maintain fixed number of outbound connections
- Optional connect-only mode
- Retry persistent connections with increasing back-off
- Source peers from DNS seeds
- Use Tor to resolve DNS
- Dynamic ban scores
- Test coverage
In addition, btcd has been refactored to make use of the new package by
extending the connection manager to work with the server to source and
maintain peer connections. The following is a broad overview of the
changes to integrate the package:
- Simplify peer state by removing pending, retry peers
- Refactor to remove retries which are now handled by connmgr
- Use callback to add addresses sourced from the DNS seed
Finally the following connection-related things have been improved as a
part of this refactor:
- Fixes 100% cpu usage when network is down (#129)
- Fixes issues with max peers (#577)
- Simplify outbound peer connections management
This commit adds an additional closure function to the mempool’s config
which computes the median time past from the point of view of the best
node in the chain. The mempool test harness has also been updated to allow
setting a mock median time past for testing purposes.
In addition to increasing the testability of the mempool, this commit
should also speed up transaction and block validation for BIP 113 as
the MTP no longer needs to be re-calculated each time from scratch.
This makes the enforcement of the bloom filter service bit much more
strict. In particular, it does the following:
- Moves the enforcement of the bloom filter service bit out of the peer
package and into the server so the server can ban as necessary
- Disconnect peers that send filter commands when the server is
configured to disable them regardless of the protocol version
- Bans peers that are a high enough protocol version that they are
supposed to observe the service bit is disabled, but ignore it and
send filter commands regardless.
As an added bonus, this fixes the old logic which had a bug in that it
was examining the *remote* peer's supported services in order to choose
whether or not to disconnect instead of the *local* server's supported
services.
This commit adds two new cli flags: one for accepting non-std
transactions, and the other for rejecting non-std transactions.
The two flag are rejected when using concurrently. Config parsing is
set up such that, the desired policy expressed via the config always
overrides the policy set by default for a particular chain.
The doc.go files and the sample-btcd.conf file have been updated to document
the new flags exposing further policy control.
This modifies the config for the new mempool package such that it takes
a callback function to obtain the best chain height instead of requiring
a fully initialized blockchain.BlockChain instance.
This will make it much easier to test the mempool since the tests will
be able to provide their own height function to test various
functionality without having create and manipulate full blocks and chain
instances.
This does the minimum work necessary to refactor the mempool code into
its own package. The idea is that separating this code into its own
package will greatly improve its testability, allow independent
benchmarking and profiling, and open up some interesting opportunities
for future development related to the memory pool.
There are likely some areas related to policy that could be further
refactored, however it is better to do that in future commits in order
to keep the changeset as small as possible during this refactor.
Overview of the major changes:
- Create the new package
- Move several files into the new package:
- mempool.go -> mempool/mempool.go
- mempoolerror.go -> mempool/error.go
- policy.go -> mempool/policy.go
- policy_test.go -> mempool/policy_test.go
- Update mempool logging to use the new mempool package logger
- Rename mempoolPolicy to Policy (so it's now mempool.Policy)
- Rename mempoolConfig to Config (so it's now mempool.Config)
- Rename mempoolTxDesc to TxDesc (so it's now mempool.TxDesc)
- Rename txMemPool to TxPool (so it's now mempool.TxPool)
- Move defaultBlockPrioritySize to the new package and export it
- Export DefaultMinRelayTxFee from the mempool package
- Export the CalcPriority function from the mempool package
- Introduce a new RawMempoolVerbose function on the TxPool and update
the RPC server to use it
- Update all references to the mempool to use the package.
- Add a skeleton README.md
This reduces the mempool lock contention by removing an unnecessary
check when responding to a "mempool" request.
In particular, the code first gets a list of all transactions from the
mempool and then iterates them in order to construct the inventory
vectors and apply bloom filtering if it is enabled. Since it is
possible that the transaction was removed from the mempool by another
thread while that list is being iterated, the code was checking if each
transaction was still in the mempool. This is a pointless check because
the transaction might still be removed at any point after the check
anyways. For example, it might be removed after the mempool response
has been sent to the remote peer or even while the loop is still
iterating.
This rewrites the shutdown logic to simplify the shutdown signalling.
All cleanup is now run from deferred functions in the main function and
channels are used to signal shutdown either from OS signals or from
other subsystems such as the RPC server and windows service controller.
The RPC server has been modified to use a new channel for signalling
shutdown that is exposed via the RequestedProcessShutdown function
instead of directly calling Stop on the server as it previously did.
Finally, it adds a few checks for early termination during the main
start sequence so the process can be stopped without starting all the
subsystems if desired.
This is a backport of the equivalent logic from Decred with a few slight
modifications. Credits go to @jrick.
This is mostly a backport of some of the same modifications made in
Decred along with a few additional things cleaned up. In particular,
this updates the code to make use of the new chainhash package.
Also, since this required API changes anyways and the hash algorithm is
no longer tied specifically to SHA, all other functions throughout the
code base which had "Sha" in their name have been changed to Hash so
they are not incorrectly implying the hash algorithm.
The following is an overview of the changes:
- Remove the wire.ShaHash type
- Update all references to wire.ShaHash to the new chainhash.Hash type
- Rename the following functions and update all references:
- wire.BlockHeader.BlockSha -> BlockHash
- wire.MsgBlock.BlockSha -> BlockHash
- wire.MsgBlock.TxShas -> TxHashes
- wire.MsgTx.TxSha -> TxHash
- blockchain.ShaHashToBig -> HashToBig
- peer.ShaFunc -> peer.HashFunc
- Rename all variables that included sha in their name to include hash
instead
- Update for function name changes in other dependent packages such as
btcutil
- Update copyright dates on all modified files
- Update glide.lock file to use the required version of btcutil
This adds support for serving headers instead of inventory messages in
accordance with BIP0130. btcd itself does not yet make use of the
feature when receiving data.
It is not the responsibility of mempool to relay transactions, so
return a slice of transactions accepted to the mempool due to the
passed transaction to the caller.
having 3 int32s above the uint64s in the struct
will cause misalignment for some 32-bit architectures.
see https://golang.org/pkg/sync/atomic/#pkg-note-BUG
This aligns bytesReceived and bytesSent.
