dce8c4c381 rpc: getblockfrompeer (Sjors Provoost)
b884ababc2 rpc: move Ensure* helpers to server_util.h (Sjors Provoost)
Pull request description:
This adds an RPC method to fetch a block directly from a peer. This can used to fetch stale blocks with lower proof of work that are normally ignored by the node (`headers-only` in `getchaintips`).
Usage:
```
bitcoin-cli getblockfrompeer HASH peer_n
```
Closes#20155
Limitations:
* you have to specify which peer to fetch the block from
* the node must already have the header
ACKs for top commit:
jnewbery:
ACK dce8c4c381
fjahr:
re-ACK dce8c4c381
Tree-SHA512: 843ba2b7a308f640770d624d0aa3265fdc5c6ea48e8db32269b96a082b7420f7953d1d8d1ef2e6529392c7172dded9d15639fbc9c24e7bfa5cfb79e13a5498c8
0c85dc30e6 p2p: Don't use timestamps from inbound peers (Martin Zumsande)
Pull request description:
`GetAdjustedTime()` (used e.g. in validation and addrman) returns a time with an offset that is influenced by timestamps that our peers have sent us in their version message.
Currently, timestamps from all peers are used for this.
However, I think that it would make sense to ignore the timedata samples from inbound peers, making it much harder for others to influence the Adjusted Time in a targeted way.
With the extra feeler connections (every 2 minutes on average) and extra block-relay-only connections (every 5 minutes on average) there are also now plenty of opportunities to gather a meaningful number of timedata samples from outbound peers.
There are some measures in place to prevent abuse: the `-maxtimeadjustment` parameter with a default of 70 minutes, warnings in cases of large deviations, only using the first 200 samples ([explanation](383d350bd5/src/timedata.cpp (L57-L72))), but I think that only using samples from outbound connections in the first place would be an additional safety measure that would make sense.
See also issue #4521 for further context and links: There have been several discussions in the past about replacing or abolishing the existing timedata system.
ACKs for top commit:
jnewbery:
Concept and code review ACK 0c85dc30e6
naumenkogs:
ACK 0c85dc30e6
vasild:
ACK 0c85dc30e6
Tree-SHA512: 2d6375305bcae034d68b58b7a07777b40ac430dfed554c88e681a048c527536691e1b7d08c0ef995247d356f8e81aa0a4b983bf2674faf6a416264e5f1af0a96
11daf6ceb1 More Span simplifications (Pieter Wuille)
568dd2f839 Replace MakeSpan helper with Span deduction guide (Pieter Wuille)
Pull request description:
C++17 supports [user-defined deduction guides](https://en.cppreference.com/w/cpp/language/class_template_argument_deduction), allowing class constructors to be invoked without specifying class template arguments. Instead, the code can contain rules to infer the template arguments from the constructor argument types.
This alleviates the need for the `MakeSpan` helper. Convert the existing MakeSpan rules into deduction rules for `Span` itself, and replace all invocations of `MakeSpan` with just `Span` ones.
ACKs for top commit:
MarcoFalke:
re-ACK 11daf6ceb1 Only change is removing a hunk in the tests 🌕
Tree-SHA512: 10f3e82e4338f39d9b7b407cd11aac7ebe1e9191b58e3d7f4e5e338a4636c0e126b4a1d912127c7446f57ba356c8d6544482e47f97901efea6a54fffbfd7895f
6aed8b7e9b [test] tx processing before and after ibd (glozow)
b9e105b664 [net_processing] ignore all transactions during ibd (glozow)
Pull request description:
This is basically a mini, IBD-only version of #21224
Incoming transactions aren't really relevant until we're caught up. That's why we send a giant feefilter and don't send tx getdatas, but we also shouldn't process them if peers send them anyway. Simply ignore them.
ACKs for top commit:
jnewbery:
reACK 6aed8b7e9b
laanwj:
Code review ACK 6aed8b7e9b
Tree-SHA512: 8e1616bf355f9d0b180bdbc5461f24c757dc5d7bc7bf651470f3b0bffcca5d5e68287106255b5cede2d96b42bce448a0f8c0649de35a530c5e079f7c89c70a35
CTxMemPool::check() will carry out internal consistency checks 1/n times,
where n is set by the `-checkmempool` configuration option. By default,
mempool consistency checks are disabled entirely on mainnet.
Therefore, this change has no effect on mainnet nodes running with
default configuration. It simply removes the responsibility to trigger
mempool consistency checks from net_processing.
This just calls through to AcceptToMemoryPool() internally, and is currently unused.
Also add a new transaction validation failure reason TX_NO_MEMPOOL to
indicate that there is no mempool.
082c5bf099 [refactor] pass coinsview and height to check() (glozow)
ed6115f1ea [mempool] simplify some check() logic (glozow)
9e8d7ad5d9 [validation/mempool] use Spend/AddCoin instead of UpdateCoins (glozow)
09d18916af MOVEONLY: remove single-use helper func CheckInputsAndUpdateCoins (glozow)
e8639ec26a [mempool] remove now-unnecessary code (glozow)
54c6f3c1da [mempool] speed up check() by using coins cache and iterating in topo order (glozow)
30e240f65e [bench] Benchmark CTxMemPool::check() (glozow)
cb1407196f [refactor/bench] make mempool_stress bench reusable and parameterizable (glozow)
Pull request description:
Remove the txmempool <-> validation circular dependency by removing txmempool's dependency on validation. There are two functions in txmempool that need validation right now: `check()` and `removeForReorg()`. This PR removes the dependencies in `check()`.
This PR also improves the performance of `CTxMemPool::check()` by walking through the entries exactly once, in ascending ancestorcount order, which guarantees that we see parents before children.
ACKs for top commit:
jnewbery:
reACK 082c5bf099
GeneFerneau:
tACK [082c5bf](082c5bf099)
rajarshimaitra:
tACK 082c5bf099
theStack:
Code-review ACK 082c5bf099
Tree-SHA512: 40ac622af1627b5c3e6abb4f0f035d833265a8c5e8dc88faf5354875dfb5137f137825e54bbd2a2668ed37b145c5d02285f776402629f58596e51853a9a79d29
fa4ec1c0bd Make GenTxid boolean constructor private (MarcoFalke)
faeb9a5753 remove unused CTxMemPool::info(const uint256& txid) (MarcoFalke)
Pull request description:
This boolean argument is either verbose (when used with a named arg) or unintuitive and dangerous (when used as a plain bool).
Fix that by making the constructor private.
ACKs for top commit:
laanwj:
Code review ACK fa4ec1c0bd
jnewbery:
Code review ACK fa4ec1c0bd
glozow:
code review ACK fa4ec1c0bd
Tree-SHA512: bf08ee09168885cfda71e5a01ec412b93964662a90dd9d91e75f7fdf2eaff7c21a95204d0e90b00438bfeab564d0aea66bdb9c0394ee7a05743e65a817159446
fa2662c293 net: Avoid logging AlreadyHaveTx when disconnecting misbehaving peer (MarcoFalke)
Pull request description:
There is no need to log `AlreadyHaveTx` for an inv when a peer is marked for disconnection due to sending that inv. In fact, I find it confusing that a `block-relay-only` connection calls `AlreadyHaveTx` at all. Also there is no need to call `AddKnownTx` when the peer is marked for disconnection.
ACKs for top commit:
naumenkogs:
ACK fa2662c293
jnewbery:
Code review ACK fa2662c293
dunxen:
Concept and code review ACK fa2662c293
Tree-SHA512: 9996b807a824021f992b5281d82ff0cbbe6a442c2fedf7dfd6adda64ccc5e0ef4fb0ff91ab75086f975837bbbb7a5934ac7e671a80dcababa7203c92fc0c7f84
4307849256 [mempool] delete exists(uint256) function (glozow)
d50fbd4c5b create explicit GenTxid::{Txid, Wtxid} ctors (glozow)
Pull request description:
We use the same type for txids and wtxids, `uint256`. In places where we want the ability to pass either one, we distinguish them using `GenTxid`.
The (overloaded) `CTxMemPool::exists()` function is defined as follows:
```c
bool exists(const uint256& txid) const { return exists(GenTxid{false, txid}); }
```
It always assumes that a uint256 is a txid, which is a footgunny interface.
Querying by wtxid returns a false negative if the transaction has a witness. 🐛
Another approach would be to try both:
```c
bool exists(const uint256& txid) const { return exists(GenTxid{false, txid}) || exists(GenTxid{false, txid}); }
```
But that's slower and wrongfully placing the burden on the callee; the caller always knows whether the hash is a txid or a wtxid.
ACKs for top commit:
laanwj:
Code review ACK 4307849256
jnewbery:
Tested and code review ACK 4307849256
MarcoFalke:
review ACK 4307849256👘
Tree-SHA512: 8ed167a96f3124b6c14e41073c8358658114ce121a15a4cca2db7a5ac565903a6236e34e88ac03382b8bb8b68e3999abbfc5718bc8c22476554d6b49a5298eec
021f86953e [style] Run changed files through clang formatter. (Amiti Uttarwar)
375750387e scripted-diff: Rename CAddrInfo to AddrInfo (Amiti Uttarwar)
dd8f7f2500 scripted-diff: Rename CAddrMan to AddrMan (Amiti Uttarwar)
3c263d3f63 [includes] Fix up included files (Amiti Uttarwar)
29727c2aa1 [doc] Update comments (Amiti Uttarwar)
14f9e000d0 [refactor] Update GetAddr_() function signature (Amiti Uttarwar)
40acd6fc9a [move-only] Move constants to test-only header (Amiti Uttarwar)
7cf41bbb38 [addrman] Change CAddrInfo access (Amiti Uttarwar)
e3f1ea659c [move-only] Move CAddrInfo to test-only header file (Amiti Uttarwar)
7cba9d5618 [net, addrman] Remove external dependencies on CAddrInfo objects (Amiti Uttarwar)
8af5b54f97 [addrman] Introduce CAddrMan::Impl to encapsulate addrman implementation. (Amiti Uttarwar)
f2e5f38f09 [move-only] Match ordering of CAddrMan declarations and definitions (Amiti Uttarwar)
5faa7dd6d8 [move-only] Move CAddrMan function definitions to cpp (Amiti Uttarwar)
Pull request description:
Introduce the pimpl pattern for AddrMan to separate the implementation details from the externally used object representation. This reduces compile-time dependencies and conceptually clarifies AddrMan's interface from the implementation specifics.
Since the unit & fuzz tests currently rely on accessing AddrMan internals, this PR introduces addrman_impl.h, which is exclusively imported by addrman.cpp and test files.
ACKs for top commit:
jnewbery:
ACK 021f86953e
GeneFerneau:
utACK [021f869](021f86953e)
mzumsande:
ACK 021f86953e
rajarshimaitra:
Concept + Code Review ACK 021f86953e
theuni:
ACK 021f86953e
Tree-SHA512: aa70cb77927a35c85230163c0cf6d3872382d79048b0fb79341493caa46f8e91498cb787d8b06aba4da17b2f921f2230e73f3d66385519794fff86a831b3a71d
9d0379cea6 consensus: use <cstdint> over <stdint.h> in amount.h (fanquake)
863e52fe63 consensus: make COIN & MAX_MONEY constexpr (fanquake)
d09071da5b [MOVEONLY] consensus: move amount.h into consensus (fanquake)
Pull request description:
A first step (of a few) towards some source code reorganization, as well as making libbitcoinconsensus slightly more self contained.
Related to #15732.
ACKs for top commit:
MarcoFalke:
concept ACK 9d0379cea6 🏝
Tree-SHA512: 97fc79262dcb8c00996852a288fee69ddf8398ae2c95700bba5b326f1f38ffcfaf8fa66e29d0cb446d9b3f4e608a96525fae0c2ad9cd531ad98ad2a4a687cd6a
The new name describes better what the bool does and also limits the confusion of the three different concepts:
* fBlocksOnly (This bool to skip tx invs)
* -blocksonly (A setting to ignore incoming txs)
* block-relay-only (A connection type in the block-relay-only P2P graph)
Improve readability of code, simplify future scripted diff cleanup PRs, and be
more consistent with naming for GetBoolArg.
This will also be useful for replacing runtime settings type checking
with compile time checking.
-BEGIN VERIFY SCRIPT-
git grep -l GetArg | xargs sed -i 's/GetArg(\([^)]*\( [0-9]\+\|-1\|port\|BaseParams().RPCPort()\|Params().GetDefaultPort()\|_TIMEOUT\|Height\|_WORKQUEUE\|_THREADS\|_CONNECTIONS\|LIMIT\|SigOp\|Bytes\|_VERSION\|_AGE\|_CHECKS\|Checks() ? 1 : 0\|_BANTIME\|Cache\|BLOCKS\|LEVEL\|Weight\|Version\|BUFFER\|TARGET\|WEIGHT\|TXN\|TRANSACTIONS\|ADJUSTMENT\|i64\|Size\|nDefault\|_EXPIRY\|HEIGHT\|SIZE\|SNDHWM\|_TIME_MS\)\))/GetIntArg(\1)/g'
-END VERIFY SCRIPT-
Co-authored-by: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
The us=... message in the debug log when sending a version message is
always [::]:0, because we no longer send our own address there.
Therefore, this information is entirely redundant. Remove it.
Historically, the VERSION message contains an "addrMe" and an "addrYou". As
these are sent before version negotiation is complete, the protocol version is
INIT_PROTO_VERSION (209), and in that protocol, CAddress is serialized without
nTime.
This is in fact the only situation left where a CAddress is (de)serialized
without nTime. As it's such a simple structure (CService for ip/port + uint64_t
for nServices), just inline that structure in the few places where it occurs,
and remove the logic for dealing with missing nTime from CAddress.
d930c7f5b0 p2p, rpc, test: address rate-limiting follow-ups (Jon Atack)
Pull request description:
Incorporates review feedback in #22387.
Edit, could be considered separately: should a release note (or two) be added for 22.0? e.g. the new getpeerinfo fields in `Updated RPCs` and the rate-limiting itself in `P2P and network changes`.
ACKs for top commit:
MarcoFalke:
review ACK d930c7f5b0
theStack:
re-ACK d930c7f5b0🌮
Zero-1729:
crACK d930c7f
Tree-SHA512: b2101cad87f59c238603f38bd8e8df7a4d48929794e4de9e0e0ff2afa935a68475c2d369aa669d124a0bec2f50280fb47e8b980bde6ad812db08cf67b71c066a
Currently, this call to SetupAddressRelay will never return false because of
the previous guard that returns early if the peer is not an inbound connection.
Rather than implicitly relying on this guarantee, throw an error in the debug
build if it ever changes.
5e33f762d4 p2p, rpc: address relay fixups (Jon Atack)
Pull request description:
Following review of new changes merged today, move a use of `statestats` in getpeerinfo to within the section guarded by `if (fStateStats)`, e.g. `PeerManagerImpl::GetNodeStateStats` true, and pass an in-param by reference to const.
ACKs for top commit:
amitiuttarwar:
ACK 5e33f762d4
jnewbery:
ACK 5e33f762d4
Tree-SHA512: b42f33c615b14079e2c4e6060209de8707d71b351dd1e11e04a2a6fc12d15747d0c5d9b24850217080fd1ef92e63f96d6925c4badf280b781edd696c349be7d6
703b1e612a Close minor startup race between main and scheduler threads (Larry Ruane)
Pull request description:
This is a low-priority bug fix. The scheduler thread runs `CheckForStaleTipAndEvictPeers()` every 45 seconds (EXTRA_PEER_CHECK_INTERVAL). If its first run happens before the active chain is set up (`CChain::SetTip()`), `bitcoind` will assert:
```
(...)
2021-07-28T22:16:49Z init message: Loading block index…
bitcoind: validation.cpp:4968: CChainState& ChainstateManager::ActiveChainstate() const: Assertion `m_active_chainstate' failed.
Aborted (core dumped)
```
I ran into this while using the debugger to investigate an unrelated problem. Single-stepping through threads with a debugger can cause the relative thread execution timing to be very different than usual. I don't think any automated tests are needed for this PR. I'll give reproduction steps in the next PR comment.
ACKs for top commit:
MarcoFalke:
cr ACK 703b1e612a
tryphe:
tested ACK 703b1e612a
0xB10C:
ACK 703b1e612a
glozow:
code review ACK 703b1e612a - it makes sense to me to start peerman's background tasks here, after `chainstate->LoadChainTip()` and `node.connman->Start()` have been called.
Tree-SHA512: 9316ad768cba3b171f62e2eb400e3790af66c47d1886d7965edb38d9710fc8c8f8e4fb38232811c9346732ce311d39f740c5c2aaf5f6ca390ddc48c51a8d633b
3f7250b328 [test] Use the new endpoint to improve tests (Amiti Uttarwar)
3893da06db [RPC] Add field to getpeerinfo to indicate if addr relay is enabled (Amiti Uttarwar)
0980ca78cd [test] Test that we intentionally select addr relay peers. (Amiti Uttarwar)
c061599e40 [net_processing] Remove RelayAddrsWithPeer function (Amiti Uttarwar)
201e496481 [net_processing] Introduce new field to indicate if addr relay is enabled (Amiti Uttarwar)
1d1ef2db7e [net_processing] Defer initializing m_addr_known (Amiti Uttarwar)
6653fa3328 [test] Update p2p_addr_relay test to prepare (Amiti Uttarwar)
2fcaec7bbb [net_processing] Introduce SetupAddressRelay (Amiti Uttarwar)
Pull request description:
This PR builds on the test refactors extracted into #22306 (first 5 commits).
This PR aims to reduce addr blackholes. When we receive an `addr` message that contains 10 or less addresses, we forward them to 1-2 peers. This is the main technique we use for self advertisements, so sending to peers that wouldn't relay would effectively "blackhole" the trickle. Although we cannot prevent this in a malicious case, we can improve it for the normal, honest cases, and reduce the overall likelihood of occurrence. Two known cases where peers would not participate in addr relay are if they have connected to you as a block-relay-only connection, or if they are a light client.
This implementation defers initialization of `m_addr_known` until it is needed, then uses its presence to decide if the peer is participating in addr relay. For outbound (not block-relay-only) peers, we initialize the filter before sending the initial self announcement when processing their `version` message. For inbound peers, we initialize the filter if/when we get an addr related message (`ADDR`, `ADDRV2`, `GETADDR`). We do NOT initialize the filter based on a `SENDADDRV2` message.
To communicate about these changes beyond bitcoin core & to (try to) ensure that no other software would be disrupted, I have:
- Posted to the [mailing list](https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-April/018784.html)
- Researched other open source clients to confirm compatibility, opened issues in all the projects & documented in https://github.com/bitcoin/bitcoin/pull/21528#issuecomment-809906430. Many have confirmed that this change would not be problematic.
- Raised as topic during [bitcoin-core-dev meeting](https://www.erisian.com.au/bitcoin-core-dev/log-2021-03-25.html#l-954)
- Raised as topic during [bitcoin p2p meeting](https://www.erisian.com.au/bitcoin-core-dev/log-2021-04-20.html#l-439)
ACKs for top commit:
jnewbery:
reACK 3f7250b328
glozow:
ACK 3f7250b328
ajtowns:
utACK 3f7250b328
Tree-SHA512: 29069282af684c1cd37d107c395fdd432dcccb11626f3c2dabfe92fdc4c85e74c7c4056fbdfa88017fec240506639b72ac6c311f8ce7c583112eb15f47e421af
Don't schedule class PeerManagerImpl's background tasks from its
constructor, but instead do that from a separate method,
StartScheduledTasks(), that can be called later at the end of startup,
after other things, such as the active chain, are initialzed.
Use SetupAddressRelay to only initialize `m_addr_known` as needed. For outbound
peers, we initialize the filter before sending our self announcement (not
applicable for block-relay-only connections). For inbound peers, we initialize
the filter when we get an addr related message (ADDR, ADDRV2, GETADDR).
These changes intend to mitigate address blackholes. Since an inbound peer has
to send us an addr related message to become eligible as a candidate for addr
relay, this should reduce our likelihood of sending them self-announcements.
Idempotent function that initializes m_addr_known for connections that support
address relay (anything other than block-relay-only). Unused until the next
commit.
