The *_RECENT_CONSENSUS_CHANGE variants in the validation result
enumerations were always unused. They seem to have been kept around
speculatively for a soft fork after segwit, however they were never used
for taproot either. This points at them not having a clear purpose.
Based on the original pull requests' comments their usage was never
entirely clear:
https://github.com/bitcoin/bitcoin/pull/11639#issuecomment-370234133https://github.com/bitcoin/bitcoin/pull/15141#discussion_r271039747
Since they are part of the validation interface and need to exposed by
the kernel library keeping them around may also be confusing to future
users of the library.
The usage of this bool will increase in scope in the next commit.
For this commit, the value of this bool is accurate at each
ProcessInvalidTx callsite:
- ProcessOrphanTx -> this tx is an orphan i.e. has been rejected before
- ProcessPackageResult -> 1p1c only, each transaction is either an
orphan or in m_lazy_recent_rejects_reconsiderable
- ProcessMessage -> tx was received over p2p and validated for the first
time
This will become necessary in later commits that query mempool. We also
introduce the TxDownloadOptions in this commit to make the later diff
easier to review.
This module is going to be responsible for managing everything related
to transaction download, including txrequest, orphan transactions and
package relay. It will be responsible for managing usage of the
TxOrphanage and instructing PeerManager:
- what tx or package-related messages to send to which peer
- whether a tx or package-related message is allowed or useful
- what transactions are available to try accepting to mempool
Future commits will consolidate the interface and re-delegate
interactions from PeerManager to TxDownloadManager.
a97f43d63a6e835bae20b0bc5d536df98f55d8a0 fuzz: Add harness for p2p headers sync (marcofleon)
a0eaa4749fe0f755e113eee70dee1989bdc07ad5 Add FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION in PoW check (marcofleon)
a3f6f5acd89f2f5bb136ec247f259d212e8944d0 build: Automatically define FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION for fuzz builds (marcofleon)
0c02d4b2bdbc7a3fc3031a63b3b16bafa669d51c net_processing: Make MAX_HEADERS_RESULTS a PeerManager option (marcofleon)
Pull request description:
This PR reopens https://github.com/bitcoin/bitcoin/pull/28043. It's a regression fuzz test for https://github.com/bitcoin/bitcoin/pull/26355 and [a couple bugs](ed6cddd98e) that were addressed in https://github.com/bitcoin/bitcoin/pull/25717. This should help us move forward with the [removal of mainnet checkpoints](https://github.com/bitcoin/bitcoin/pull/25725).
It seems like the main concern in https://github.com/bitcoin/bitcoin/pull/28043 was the global mock function for proof of work. This PR aims to be an improvement by replacing the previous approach with a fuzz build configured using `FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION`. This ensures that the simplified test code will never be in a release binary. If we agree this is the way to go, there are some other places (for future targets) where this method could be used.
In this target, PoW isn't being tested, so the goal is to bypass the check and let the fuzzer do its thing. In the other harnesses where PoW is actually being fuzzed, `CheckProofOfWork` is now `CheckProofOfWorkImpl`. So, the only change to that function is in the name.
More about `FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION` can be found at https://llvm.org/docs/LibFuzzer.html#fuzzer-friendly-build-mode and https://github.com/AFLplusplus/AFLplusplus/blob/stable/docs/fuzzing_in_depth.md#d-modifying-the-target.
ACKs for top commit:
naumenkogs:
ACK a97f43d63a6e835bae20b0bc5d536df98f55d8a0
dergoegge:
reACK a97f43d63a6e835bae20b0bc5d536df98f55d8a0
instagibbs:
tested ACK a97f43d63a6e835bae20b0bc5d536df98f55d8a0
brunoerg:
ACK a97f43d63a6e835bae20b0bc5d536df98f55d8a0
Tree-SHA512: 60b0bc6aadd8ca4c39db9cbba2da2debaaf68afcb6a8dd75c1ce48ca9e3996948fda8020930b6771a424e0f7c41b0b1068db4aa7dbe517f8fc152f1f712058ad
`m_is_inbound` cannot be changed throughout the life of a `Peer`. However, we
are currently storing it in `CNodeState`, which requires locking `cs_main` in
order to access it. This can be moved to the outside scope and only require
`m_peer_mutex`.
This is a refactor in preparation for Erlay reworks.
a2955f09792b6232f3a45aa44a498b466279a8b7 validation: Use span for ImportBlocks paths (TheCharlatan)
20515ea3f5bd426f6e3746cf5cddd2324dacae31 validation: Use span for CalculateClaimedHeadersWork (TheCharlatan)
52575e96e72a0402c448f86728b2e84836b1e817 validation: Use span for ProcessNewBlockHeaders (TheCharlatan)
Pull request description:
Makes it friendlier for potential future users of the kernel library if they do not store the headers in a std::vector, but can guarantee contiguous memory.
Take this opportunity to also change the argument of ImportBlocks previously taking a `std::vector` to a `std::span`.
ACKs for top commit:
stickies-v:
re-ACK a2955f09792b6232f3a45aa44a498b466279a8b7 - no changes except further walking the ~file~ path of modernizing variable names.
maflcko:
ACK a2955f09792b6232f3a45aa44a498b466279a8b7 🕑
achow101:
ACK a2955f09792b6232f3a45aa44a498b466279a8b7
danielabrozzoni:
ACK a2955f09792b6232f3a45aa44a498b466279a8b7
Tree-SHA512: 8b07f4ad26e270b65600d1968cd78847b85caca5bfbb83fd9860389f26656b1d9a40b85e0990339f50403d18cedcd2456990054f3b8b0bedce943e50222d2709
fa09cb41f58d0483ffe134eb274b9048c5260faa refactor: Remove unused LogPrint (MarcoFalke)
333341589010b1d9b21b68ae6649992fd2653756 scripted-diff: LogPrint -> LogDebug (MarcoFalke)
Pull request description:
`LogPrint` has many issues:
* It seems to indicate that something is being "printed", however config options such as `-printtoconsole` actually control what and where something is logged.
* It does not mention the log severity (debug).
* It is a deprecated alias for `LogDebug`, according to the dev notes.
* It wastes review cycles, because reviewers sometimes point out that it is deprecated.
* It makes the code inconsistent, when both are used, possibly even in lines right next to each other (like in `InitHTTPServer`)
Fix all issues by removing the deprecated alias.
I checked all conflicting pull requests and at the time of writing there are no conflicts, except in pull requests that are marked as draft, are yet unreviewed, or are blocked on feedback for other reasons. So I think it is fine to do now.
ACKs for top commit:
stickies-v:
ACK fa09cb41f58d0483ffe134eb274b9048c5260faa
danielabrozzoni:
utACK fa09cb41f58d0483ffe134eb274b9048c5260faa
TheCharlatan:
ACK fa09cb41f58d0483ffe134eb274b9048c5260faa
Tree-SHA512: 14270f4cfa3906025a0b994cbb5b2e3c8c2427c0beb19c717a505a2ccbfb1fd1ecf2fd03f6c52d22cde69a8d057e50d2207119fab2c2bc8228db3f10d4288d0f
Makes it friendlier for potential future users of the kernel library if
they do not store the headers in a std::vector, but can guarantee
contiguous memory.
Makes it friendlier for potential future users of the kernel library if
they do not store the headers in a std::vector, but can guarantee
contiguous memory.
The following scripted-diff commit will replace ParseHex("...") with "..."_hex_u8, but this replacement will not work in cases where vectors are needed instead of arrays, and is not ideal in cases where std::byte is accepted.
For example, it is currently necessary to use _hex_v_u8 when calling CScript operator<< because that operator does not currently support std::array or std::byte.
Conversely, it is incorrect to use _hex_v instead of _hex in net_processing.cpp for the MakeAndPushMessage argument, because if the argument is a std::vector it is considered variable-length and serialized with a size prefix, but if the argument is a std::array or Span is it considered fixed length and serialized without a prefix.
By the same logic, it is also safe to change the NUMS_H constant in pubkey.cpp from a std::vector to std::array because it is never serialized.
49d569cb1fdd62a9da8dff51dccaf4680fe3d0eb p2p: For assumeutxo, download snapshot chain before background chain (Martin Zumsande)
7a885518d57c6eb818ebef5fd04a575f324ee8b2 p2p: Restrict downloading of blocks for snapshot chain (Martin Zumsande)
Pull request description:
After loading a snapshot, `pindexLastCommonBlock` is usually already set to some block for existing peers. That means we'd continue syncing the background chain from those peers instead of prioritising the snapshot chain, which defeats the purpose of doing assumeutxo in the first place. Only existing peers are affected by this bug.
ACKs for top commit:
fjahr:
re-ACK 49d569cb1fdd62a9da8dff51dccaf4680fe3d0eb
achow101:
ACK 49d569cb1fdd62a9da8dff51dccaf4680fe3d0eb
Sjors:
tACK 49d569cb1fdd62a9da8dff51dccaf4680fe3d0eb
Tree-SHA512: 0eaebe1c29a8510d5ced57e14c09b128ccb34b491692815291df68bf12e2a15b52b1e7bf8d9f34808904e7f7bc20f70b0ad0f7e14df93bbdf456bd12cc02a5d2
After loading a snapshot, pindexLastCommonBlock is usually already set
to some block for existing peers. That means we'd continue syncing the
background chain from those peers instead of prioritising the snapshot
chain, which defeats the purpose of doing assumeutxo in the first place.
Only existing peers are affected by this bug.
If the best chain of the peer doesn't include the snapshot
block, it is futile to download blocks from this chain,
because we couldn't reorg to it. We'd also crash
trying to reorg because this scenario is not handled.
Now that m_txrequest and m_recent_confirmed_transactions are guarded by
the same mutex, there is no benefit to processing them separately.
Instead, just loop through pblock->vtx once.
Resetting m_recent_rejects once per block is more efficient than
comparing hashRecentRejectsChainTip with the chain tip every time we
call AlreadyHaveTx. We keep hashRecentRejectsChainTip for now to assert
that updates happen correctly; it is removed in the next commit.
We need to synchronize between various tx download structures.
TxRequest does not inherently need cs_main for synchronization, and it's
not appropriate to lock all of the tx download logic under cs_main.
16bd283b3ad05daa41259a062aee0fc05b463fa6 Reapply "test: p2p: check that connecting to ourself leads to disconnect" (Sebastian Falbesoner)
0dbcd4c14855fe2cba15a32245572b693dc18c4e net: prevent sending messages in `NetEventsInterface::InitializeNode` (Sebastian Falbesoner)
66673f1c1302c986e344c7f44bb0b352213d5dc8 net: fix race condition in self-connect detection (Sebastian Falbesoner)
Pull request description:
This PR fixes a recently discovered race condition in the self-connect detection (see #30362 and #30368).
Initiating an outbound network connection currently involves the following steps after the socket connection is established (see [`CConnman::OpenNetworkConnection`](bd5d1688b4/src/net.cpp (L2923-L2930)) method):
1. set up node state
2. queue VERSION message (both steps 1 and 2 happen in [`InitializeNode`](bd5d1688b4/src/net_processing.cpp (L1662-L1683)))
3. add new node to vector `m_nodes`
If we connect to ourself, it can happen that the sent VERSION message (step 2) is received and processed locally *before* the node object is added to the connection manager's `m_nodes` vector (step 3). In this case, the self-connect remains undiscovered, as the detection doesn't find the outbound peer in `m_nodes` yet (see `CConnman::CheckIncomingNonce`).
Fix this by swapping the order of 2. and 3., by taking the `PushNodeVersion` call out of `InitializeNode` and doing that in the `SendMessages` method instead, which is only called for `CNode` instances in `m_nodes`.
The temporarily reverted test introduced in #30362 is readded. Fixes#30368.
Thanks go to vasild, mzumsande and dergoegge for suggestions on how to fix this (see https://github.com/bitcoin/bitcoin/issues/30368#issuecomment-2200625017 ff. and https://github.com/bitcoin/bitcoin/pull/30394#discussion_r1668290789).
ACKs for top commit:
naiyoma:
tested ACK [16bd283b3a), built and tested locally, test passes successfully.
mzumsande:
ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6
tdb3:
ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6
glozow:
ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6
dergoegge:
ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6
Tree-SHA512: 5b8aced6cda8deb38d4cd3fe4980b8af505d37ffa0925afaa734c5d81efe9d490dc48a42e1d0d45dd2961c0e1172a3d5b6582ae9a2d642f2592a17fbdc184445
