## Motivation
CoinJoin's subsystems are initialized by variables and managers that
occupy the global context. The _extent_ to which these subsystems
entrench themselves into the codebase is difficult to assess and moving
them out of the global context forces us to enumerate the subsystems in
the codebase that rely on CoinJoin logic and enumerate the order in
which components are initialized and destroyed.
Keeping this in mind, the scope of this pull request aims to:
* Reduce the amount of CoinJoin-specific entities present in the global
scope
* Make the remaining usage of these entities in the global scope
explicit and easily searchable
## Additional Information
* The initialization of `CCoinJoinClientQueueManager` is dependent on
blocks-only mode being disabled (which can be alternatively interpreted
as enabling the relay of transactions). The same applies to
`CBlockPolicyEstimator`, which `CCoinJoinClientQueueManager` depends.
Therefore, `CCoinJoinClientQueueManager` is only initialized if
transaction relaying is enabled and so is its scheduled maintenance
task. This can be found by looking at `init.cpp`
[here](93f8df1c31/src/init.cpp (L1681-L1683)),
[here](93f8df1c31/src/init.cpp (L2253-L2255))
and
[here](93f8df1c31/src/init.cpp (L2326-L2327)).
For this reason, `CBlockPolicyEstimator` is not a member of `CJContext`
and its usage is fulfilled by passing it as a reference when
initializing the scheduling task.
* `CJClientManager` has not used `CConnman` or `CTxMemPool` as `const`
as existing code that is outside the scope of this PR would cast away
constness, which would be unacceptable. Furthermore, some logical paths
are taken that will grind to a halt if they are stored as `const`.
Examples of such a call chains would be:
* `CJClientManager::DoMaintenance >
CCoinJoinClientManager::DoMaintenance > DoAutomaticDenominating >
CCoinJoinClientSession::DoAutomaticDenominating >
CCoinJoinClientSession::StartNewQueue > CConnman::AddPendingMasternode`
which modifies `CConnman::vPendingMasternodes`, which is non-const
behaviour
* `CJClientManager::DoMaintenance >
CCoinJoinClientManager::DoMaintenance > DoAutomaticDenominating >
CCoinJoin::IsCollateralValid > AcceptToMemoryPool` which adds a
transaction to the memory pool, which is non-const behaviour
* There were cppcheck [linter
failures](https://github.com/dashpay/dash/pull/5337#issuecomment-1685084688)
that seemed to be caused by the usage of `Assert` in
`coinjoin/client.h`. This seems to be resolved by backporting
[bitcoin#24714](https://github.com/bitcoin/bitcoin/pull/24714). (Thanks
@knst!)
* Depends on #5546
---------
Co-authored-by: Kittywhiskers Van Gogh <63189531+kittywhiskers@users.noreply.github.com>
Co-authored-by: PastaPastaPasta <6443210+PastaPastaPasta@users.noreply.github.com>
## Issue being fixed or feature implemented
Many objects created and functions called by passing `const
std::unique_ptr<Obj>& obj` instead directly passing `Obj& obj`
In some cases it is indeed needed, but in most cases it is just extra
complexity that is better to avoid.
Motivation:
- providing reference to object instead `unique_ptr` is giving warranty
that there's no `nullptr` and no need to keep it in mind
- value inside unique_ptr by reference can be changed externally and
instead `nullptr` it can turn to real object later (or in opposite)
- code is shorter but cleaner
Based on that this refactoring is useful as it reduces mental load when
reading or writing code.
`std::unique` should be used ONLY for owning object, but not for passing
it everywhere.
## What was done?
Replaced most of usages `std::unique_ptr<Obj>& obj` to `Obj& obj`.
Btw, in several cases implementation assumes that object can be nullptr
and replacement to reference is not possible.
Even using raw pointer is not possible, because the empty
std::unique_ptr can be initialized later somewhere in code.
For example, in `src/init.cpp` there's called `PeerManager::make` and
pass unique_ptr to the `node.llmq_ctx` that would be initialized way
later.
That is out of scope this PR.
List of cases, where reference to `std::unique_ptr` stayed as they are:
- `std::unique_ptr<LLMQContext>& llmq_ctx` in `PeerManagerImpl`,
`PeerManager` and `CDSNotificationInterface`
- `std::unique_ptr<CDeterministicMNManager>& dmnman` in
`CDSNotificationInterface`
Also `CChainState` have 3 references to `unique_ptr` that can't be
replaced too:
- `std::unique_ptr<llmq::CChainLocksHandler>& m_clhandler;`
- `std::unique_ptr<llmq::CInstantSendManager>& m_isman;`
- `std::unique_ptr<llmq::CQuorumBlockProcessor>&
m_quorum_block_processor;`
## How Has This Been Tested?
Run unit/functional tests.
## Breaking Changes
No breaking changes, all of these changes - are internal APIs for Dash
Core developers only.
## Checklist:
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [x] I have added or updated relevant unit/integration/functional/e2e
tests
- [x] I have made corresponding changes to the documentation
- [x] I have assigned this pull request to a milestone
---------
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
e57980b4738c10344baf136de3e050a3cb958ca5 [mempool] Remove NotifyEntryAdded and NotifyEntryRemoved callbacks (John Newbery)
2dd561f36124972d2364f941de9c3417c65f05b6 [validation] Remove pool member from ConnectTrace (John Newbery)
969b65f3f527631ede1a31c7855151e5c5d91f8f [validation] Remove NotifyEntryRemoved callback from ConnectTrace (John Newbery)
5613f9842b4000fed088b8cf7b99674c328d15e1 [validation] Remove conflictedTxs from PerBlockConnectTrace (John Newbery)
cdb893443cc16edf974f099b8485e04b3db1b1d7 [validation interface] Remove vtxConflicted from BlockConnected (John Newbery)
1168394d759b13af68acec6d5bfa04aaa24561f8 [wallet] Notify conflicted transactions in TransactionRemovedFromMempool (John Newbery)
Pull request description:
These boost signals were added in #9371, before we had a `TransactionRemovedFromMempool` method in the validation interface. The `NotifyEntryAdded` callback was used by validation to build a vector of conflicted transactions when connecting a block, which the wallet was notified of in the `BlockConnected` CValidationInterface callback.
Now that we have a `TransactionRemovedFromMempool` callback, we can fire that signal directly from the mempool for conflicted transactions.
Note that #9371 was implemented to ensure `-walletnotify` events were fired for these conflicted transaction. We inadvertently stopped sending these notifications in #16624 (Sep 2019 commit 7e89994). We should probably fix that, but in a different PR.
ACKs for top commit:
jonatack:
Re-ACK e57980b
ryanofsky:
Code review ACK e57980b4738c10344baf136de3e050a3cb958ca5, no code changes since previous review, but helpful new code comments have been added and the PR description is now more clear about where the old code came from
Tree-SHA512: 3bdbaf1ef2731e788462d4756e69c42a1efdcf168691ce1bbfdaa4b7b55ac3c5b1fd4ab7b90bcdec653703600501b4224d252cfc086aef28f9ce0da3b0563a69
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## Issue being fixed or feature implemented
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here. -->
minimizing global uses
## What was done?
<!--- Describe your changes in detail -->
Started the deglobalization, a future PR should be done to continue this
deglobalization
## How Has This Been Tested?
<!--- Please describe in detail how you tested your changes. -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->
## Breaking Changes
<!--- Please describe any breaking changes your code introduces -->
none
## Checklist:
<!--- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [x] I have added or updated relevant unit/integration/functional/e2e
tests
- [x] I have made corresponding changes to the documentation
**For repository code-owners and collaborators only**
- [x] I have assigned this pull request to a milestone
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
* llmq: move initialization logic to 'LLMQContext', add unique pointer to NodeContext
* llmq: add aliases to LLMQ globals, expose them to RPC via LLMQContext
* rpc: replace most global invocations with LLMQContext aliases
* rpc: replace quorum RPC global invocations with LLMQContext aliases
* llmq: replace individual global member arguments with context pointer
* llmq: pass aliased context pointer instead of individual globals in tests
* llmq: move BLS worker to LLMQContext, remove global
* llmq: move DKG debug manager to LLMQContext, remove global
* llmq: move DKG session manager to LLMQContext, remove global
* llmq: move quorum share manager to LLMQContext, remove global
* llmq: move quorum signing manager to LLMQContext, remove global
* fix: move chain activation logic downward to succeed LLMQ initialization
* fix: change order of initialization to reflect dependency
* llmq: pass all global pointers invoked as CDSNotificationInterface arguments
* llmq: pass reference to quorumDKGDebugManager instead of invoking global
* llmq: pass reference to quorumBlockProcessor instead of invoking global
* llmq: pass reference to quorumDKGSessionManager instead of invoking global
* llmq: pass reference to quorumManager instead of invoking global
Co-authored-by: "UdjinM6 <UdjinM6@users.noreply.github.com>"
* llmq: pass reference to quorumSigSharesManager within CSigningManager and networking
* llmq: pass reference to quorumSigSharesManager instead of invoking global
* llmq: pass reference to chainLocksHandler instead of querying global
* llmq: pass reference to quorumInstantSendManager instead of querying global
* trivial: accept argument as const where possible
* style: remove an unneeded const_cast and instead pass by const reference
* style: use const where possible
Co-authored-by: pasta <pasta@dashboost.org>
* coinjoin: make CCoinJoinServer managed pointer, assign CConnman during init
* coinjoin: make CCoinJoinClientQueueManager managed pointer, assign CConnman during init
* sporks: move spork validation logic downwards after CConnman initialization
* sporks: make CSporkManager a pointer, reduce global invocations
* governance: make CGovernanceManager a pointer, reduce global invocations
* llmq: migrate LLMQ subsystem raw pointers to managed pointers
* masternode: make activeMasternodeManager a managed pointer
* masternode: make masternodeSync a managed pointer, assign CConnman during init
* refactor: make instantsend helper functions class members
* fix: send empty CDeterministicMNList if pointer isn't initialized yet
* fix: refactor governance object retrieval logic across node and ui
Update src/interfaces/node.cpp
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
* use unique_ptr instead of shared
Signed-off-by: pasta <pasta@dashboost.org>
* unique_ptr over shared_ptr
Signed-off-by: pasta <pasta@dashboost.org>
* remove unneeded ptr
Signed-off-by: pasta <pasta@dashboost.org>
* Adjust IsTxSafeForMining checks
Signed-off-by: pasta <pasta@dashboost.org>
* use const ref
Signed-off-by: pasta <pasta@dashboost.org>
* add a todo
Signed-off-by: pasta <pasta@dashboost.org>
* use optional instead of magic max value
fixes a hypothetical bug where myIdx is not "initialized" (ie max), and we sleep forever
Signed-off-by: pasta <pasta@dashboost.org>
* simplify relay check
Signed-off-by: pasta <pasta@dashboost.org>
* use count_if instead of a loop
Signed-off-by: pasta <pasta@dashboost.org>
* add a few vector reserves
Signed-off-by: pasta <pasta@dashboost.org>
* instantsend: Use `NotifyEntryRemoved` signal instead of calling `CInstantSendManager::TransactionRemovedFromMempool` from `CTxMemPool::removeUnchecked` directly
Fixes potential mempool.cs vs cs_main (in RemoveConflictingLock) deadlock
* Apply suggestions from code review
yay, typso!
Co-authored-by: PastaPastaPasta <6443210+PastaPastaPasta@users.noreply.github.com>
Co-authored-by: PastaPastaPasta <6443210+PastaPastaPasta@users.noreply.github.com>
* instantsend: Resolve block conflicts first and take care of mempool ones later
* refactor: Rename RemoveChainLockConflictingLock -> RemoveConflictingLock
* instantsend: Handle transaction removal from mempool (for all reasons besides inclusion in blocks)
* instantsend: Remove old islocks with no known txes from db (once)
* refactor: Replace magic number with CURRENT_VERSION
* fix: Do not remove islocks for (yet) valid orphans
* Apply suggestions from code review
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
* Use single-threaded scheduler for IS, CL and Governance notifications
* Pass shared_ptr-s instead of objects themselves for CL, IS and Governance notifiers in CMainSignals/CValidatibnInterface
* llmq: Create shared_ptr for clsig at the root of its lifetime
* llmq: Create shared_ptr for islock clsig at the root of its lifetime
* llmq: Create shared_ptr for recSig at the root of its lifetime
Co-authored-by: xdustinface <xdustinfacex@gmail.com>
* Change litemode to disablegovernance, this makes it more clear what that flag actually does.
Signed-off-by: pasta <pasta@dashboost.org>
* more fLiteMode to fDisableGovernance
Signed-off-by: pasta <pasta@dashboost.org>
* handle -litemode being set
Signed-off-by: pasta <pasta@dashboost.org>
* enable privatesend by default in litemode
Signed-off-by: Pasta <pasta@dashboost.org>
* remove useless litemode check in CPrivateSendServer::ProcessMessage, must be MN, so must have litemode off already
Signed-off-by: Pasta <pasta@dashboost.org>
* change litemode to mean, doesn't validate governance, but has all other dash features
Signed-off-by: Pasta <pasta@dashboost.org>
* litemode must be off for MNs cont
Signed-off-by: Pasta <pasta@dashboost.org>
* change litemode help text
Signed-off-by: Pasta <pasta@dashboost.org>
* don't skip MN sync in litemode
Signed-off-by: Pasta <pasta@dashboost.org>
* drop fLiteMode in bitcoingui.cpp
Signed-off-by: Pasta <pasta@dashboost.org>
* skip governance sync in litemode
Signed-off-by: pasta <pasta@dashboost.org>
* remove fLiteMode in walletview.cpp
Signed-off-by: pasta <pasta@dashboost.org>
* add back
Signed-off-by: pasta <pasta@dashboost.org>
* fix comments
* fix cache loading
* fix scheduled tasks
* Fix help text for some rpcs (revert what's left of 3478)
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
* Introduce SynchronousUpdatedBlockTip signal
This version of UpdatedBlockTip mirrors the asynchronous behavior that we
had before the introduction of asynchronous signal handling.
* Fix tab spacing in validationinterface.cpp
* Invoke CDeterministicMNManager::UpdatedBlockTip from validation thread
It must be invoked synchronously as otherwise things become inconsistent.
* Call CActiveMasternodeManager::Init with block index
pindexNew in UpdatedBlockTip is not necessarily the current tip, so we
shouldn't rely on it in Init(). This is due to the async nature of the
UpdatedBlockTip invocation.
* scripted-diff: Replace #include "" with #include <> (ryanofsky)
-BEGIN VERIFY SCRIPT-
for f in \
src/*.cpp \
src/*.h \
src/bench/*.cpp \
src/bench/*.h \
src/compat/*.cpp \
src/compat/*.h \
src/consensus/*.cpp \
src/consensus/*.h \
src/crypto/*.cpp \
src/crypto/*.h \
src/crypto/ctaes/*.h \
src/policy/*.cpp \
src/policy/*.h \
src/primitives/*.cpp \
src/primitives/*.h \
src/qt/*.cpp \
src/qt/*.h \
src/qt/test/*.cpp \
src/qt/test/*.h \
src/rpc/*.cpp \
src/rpc/*.h \
src/script/*.cpp \
src/script/*.h \
src/support/*.cpp \
src/support/*.h \
src/support/allocators/*.h \
src/test/*.cpp \
src/test/*.h \
src/wallet/*.cpp \
src/wallet/*.h \
src/wallet/test/*.cpp \
src/wallet/test/*.h \
src/zmq/*.cpp \
src/zmq/*.h
do
base=${f%/*}/ relbase=${base#src/} sed -i "s:#include \"\(.*\)\"\(.*\):if test -e \$base'\\1'; then echo \"#include <\"\$relbase\"\\1>\\2\"; else echo \"#include <\\1>\\2\"; fi:e" $f
done
-END VERIFY SCRIPT-
Signed-off-by: Pasta <pasta@dashboost.org>
* scripted-diff: Replace #include "" with #include <> (Dash Specific)
-BEGIN VERIFY SCRIPT-
for f in \
src/bls/*.cpp \
src/bls/*.h \
src/evo/*.cpp \
src/evo/*.h \
src/governance/*.cpp \
src/governance/*.h \
src/llmq/*.cpp \
src/llmq/*.h \
src/masternode/*.cpp \
src/masternode/*.h \
src/privatesend/*.cpp \
src/privatesend/*.h
do
base=${f%/*}/ relbase=${base#src/} sed -i "s:#include \"\(.*\)\"\(.*\):if test -e \$base'\\1'; then echo \"#include <\"\$relbase\"\\1>\\2\"; else echo \"#include <\\1>\\2\"; fi:e" $f
done
-END VERIFY SCRIPT-
Signed-off-by: Pasta <pasta@dashboost.org>
* build: Remove -I for everything but project root
Remove -I from build system for everything but the project root,
and built-in dependencies.
Signed-off-by: Pasta <pasta@dashboost.org>
# Conflicts:
# src/Makefile.test.include
* qt: refactor: Use absolute include paths in .ui files
* qt: refactor: Changes to make include paths absolute
This makes all include paths in the GUI absolute.
Many changes are involved as every single source file in
src/qt/ assumes to be able to use relative includes.
Signed-off-by: Pasta <pasta@dashboost.org>
# Conflicts:
# src/qt/dash.cpp
# src/qt/optionsmodel.cpp
# src/qt/test/rpcnestedtests.cpp
* test: refactor: Use absolute include paths for test data files
* Recommend #include<> syntax in developer notes
* refactor: Include obj/build.h instead of build.h
* END BACKPORT #11651 Remove trailing whitespace causing travis failure
* fix backport 11651
Signed-off-by: Pasta <pasta@dashboost.org>
* More of 11651
* fix blockchain.cpp
Signed-off-by: pasta <pasta@dashboost.org>
* Add missing "qt/" in includes
* Add missing "test/" in includes
* Fix trailing whitespaces
Co-authored-by: Wladimir J. van der Laan <laanwj@gmail.com>
Co-authored-by: Russell Yanofsky <russ@yanofsky.org>
Co-authored-by: MeshCollider <dobsonsa68@gmail.com>
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
* Check MNs up to 24 blocks deep when verifying `dstx`
* Handle DSTX-es more like regular txes and not like "other" invs
* Try asking for a DSTX too when trying to find missing tx parents
* Check DSTX-es when chainlock arrives
`HasChainLock` was always `false` in `IsExpired` because tip is updated before the corresponding chainlock is received
* Apply `Handle DSTX-es more like regular txes` idea to `AlreadyHave()`
* Alternative handling of DSTX+recentRejects
Co-authored-by: Alexander Block <ablock84@gmail.com>
* Pass nAcceptTime via TransactionAddedToMempool and use it for ChainLocks
Otherwise the "first seen" time is way off after node restart
* Don't skip TransactionAddedToMempool for chainlocks while blockchain is not synced yet
Otherwise txes from mempool.dat won't be processed there
* Remove ppszTypeName from protocol.cpp and reimplement GetCommand
This removes the need to carefully maintain ppszTypeName, which required
correct order and also did not allow to permanently remove old message
types.
To get the command name for an INV type, GetCommandInternal uses a switch
which needs to be maintained from now on.
The way this is implemented also resembles the way it is implemented in
Bitcoin today, but it's not identical. The original PR that introduced the
switch case in Bitcoin was part of the Segwit changes and thus never got
backported. I decided to implement it in a slightly different way that
avoids throwing exceptions when an unknown INV type is encountered.
IsKnownType will now also leverage GetCommandInternal() to figure out if
the INV type is known locally. This has the side effect of old/legacy
message types to return false from now on. We will depend on this side
effect in later commits when we remove legacy InstantSend code.
* Stop handling/relaying legacy IX messages
When we receive an IX message, we simply treat it as a regular TX and relay
it as such.
We'll however still request IX messages when they are announced to us. We
can't simply revert to requesting TX messages in this case as it might
result in the other peer not answering due to the TX not being in mapRelay
yet. We should at some point in the future completely drop handling of IX
messages instead.
* Remove IsNewInstantSendEnabled() and only use IsInstantSendEnabled()
* Remove legacy InstantSend from GUI
* Remove InstantSend from Bitcoin/Dash URIs
* Remove legacy InstantSend from RPC commands
* Remove legacy InstantSend from wallet
* Remove legacy instantsend.h include
* Remove legacy InstantSend from validation code
* Completely remove remaining legacy InstantSend code
* Remove now unused spork
* Fix InstantSend related test failures
* Remove now obsolete auto IS tests
* Make spork2 and spork3 disabled by default
This should have no influence on mainnet as these sporks are actually set
there. This will however affect regtest, which shouldn't have LLMQ based
InstantSend enabled by default.
* Remove instantsend tests from dip3-deterministicmns.py
These were only testing legacy InstantSend
* Fix .QCheckBox#checkUsePrivateSend styling a bit
* s/TXLEGACYLOCKREQUEST/LEGACYTXLOCKREQUEST/
* Revert "verified via InstantSend" back to "verified via LLMQ based InstantSend"
* Use cmd == nullptr instead of !cmd
* Remove last parameter from AvailableCoins call
This was for fUseInstantSend which is not present anymore since rebase
* Decouple lite mode and client-side PrivateSend
`-enableprivatesend`:
1. off by default in lite mode but can be overridden
2. does not start mixing, use `-privatesendautostart` (default is off) or `privatesend` rpc instead
* Disable PS when there is no wallet, do not auto-start mixing when wallet is locked
* Check for `!fEnablePrivateSend` and `!fPrivateSendRunning` instead of `!pwalletMain` in ps client code
* Add meaningful `privatesend` rpc error messages for various cases when mmixing is disabled
This commit moves all logic of SyncTransaction into ProcessNewTransaction
and then calls it from TransactionAddedToMempool and BlockConnected.
This won't compile/work at first, but the next commits will fix this.
* rename instantx.* file to instantsend.*
* Reorganize Dash Specific code into folders
add to privatesend folder the header files
Signed-off-by: Pasta <Pasta@dash.org>
add "masternode" to imports
Signed-off-by: Pasta <Pasta@dash.org>
add "masternode" to imports
Signed-off-by: Pasta <Pasta@dash.org>
add "masternode" to imports pt 2
Signed-off-by: Pasta <Pasta@dash.org>
* Trivial: vout->txout
* Re-use SetHexStr in few more places
* Tweak log output
* fix v13 release notes links
* Drop no longer used stuff
* Few more trivial fixes
* Adjust few rpc help strings
* Apply review suggestions
* Harden DIP3 activation height
Also drop all related but no longer used parts.
* Pass current block index to GetCommitmentsFromBlock
* Allow to change dip3 activation height for tests
And fix them.
* Sort evo/* source files in Makefile.am
* Keep track of proRegTxHash in CConnman::masternodeQuorumNodes map
We will later need the proRegTxHash
* Fix serialization of std::tuple with const rvalue elements
Having serialization and deserialization in the same specialized template
results in compilation failures due to the "if(for_read)" branch.
* Implement MNAUTH message
This allows masternodes to authenticate themself.
* Protect fresh incoming connections for a second from eviction
Give fresh connections some time to do the VERSION/VERACK handshake and
an optional MNAUTH when it's a masternode. When an MNAUTH happened, the
incoming connection is then forever protected against eviction.
If a timeout of 1 second occurs or the first message after VERACK is not
MNAUTH, the node is not protected anymore and becomes eligable for
eviction.
* Avoid connecting to masternodes if an incoming connection is from the same one
Now that incoming connections from MNs authenticate them self, we can avoid
connecting to the same MNs through intra-quorum connections.
* Apply review suggestions
* Don't rely on UTXO set in CheckCanLock
The UTXO set only works for TXs in the mempool and won't work when we try
to retroactively lock unlocked TXs from blocks.
This is safe as ProcessTx is only called when a TX was accepted into the
mempool or connected in a block, which means that all input checks were
good.
* Rename RetryLockMempoolTxs to RetryLockTxs and let it retry connected TXs
* Instead of manually calling ProcessTx, let SyncTransaction handle all cases
SyncTransaction is called from AcceptToMemoryPool and when transactions got
connected in a block. So this is the time we want to run TXs through
ProcessTx. This also enables retroactive signing of TXs that were unknown
before a new block appeared.
* Test retroactive signing and safe TXs in LLMQ ChainLocks tests
* Also test for retroactive signing of chained TXs
* Honor lockedParentTx when looking for TXs to retry signing
* Stop scanning for TXs to retry after a depth of 6
* Generate 6 block to avoid retroactive signing overloading Travis
* Avoid retroactive signing
* Don't rely on NewPoWValidBlock and use SyncTransaction to build blockTxs
NewPoWValidBlock is not guaranteed to be called when blocks come in fast.
When a block is accepted in AcceptBlock, NewPoWValidBlock is only called
when the new block is a successor of the currently active tip. This is not
the case when after the first block a second block is accepted immediately
as the first block is not connected yet.
This might be a bug actually in the handling of NewPoWValidBlock, so we
might need to check/fix this later, but currently I prefer to not touch
that part.
Instead, we now use SyncTransaction to gather TXs for blockTxs. This works
because SyncTransaction is called for all transactions in a freshly
connected block in one go. The call also happens before UpdatedBlockTip is
called, so it's fine with the existing logic.
* Use tx.IsCoinBase() instead of checking index 0
Also check for empty vin.
