Introduce two new options to reach the I2P network:
* `-i2psam=<ip:port>` point to the I2P SAM proxy. If this is set then
the I2P network is considered reachable and we can make outgoing
connections to I2P peers via that proxy. We listen for and accept
incoming connections from I2P peers if the below is set in addition to
`-i2psam=<ip:port>`
* `-i2pacceptincoming` if this is set together with `-i2psam=<ip:port>`
then we accept incoming I2P connections via the I2P SAM proxy.
b4511e2e2e log: Prefix log messages with function name if -logsourcelocations is set (practicalswift)
Pull request description:
Prefix log messages with function name if `-logfunctionnames` is set.
Yes, exactly like `-logthreadnames` but for function names instead of thread names :)
This is a small developer ergonomics improvement: I've found this to be a cheap/simple way to correlate log output and originating function.
For me it beats the ordinary cycle of 1.) try to figure out a regexp matching the static part of the dynamic log message, 2.) `git grep -E 'Using .* MiB out of .* requested for signature cache'`, 3.) `mcedit filename.cpp` (`openemacs filename.cpp` works too!) and 4.) search for log message and scroll up to find the function name :)
Without any logging parameters:
```
$ src/bitcoind -regtest
2020-08-25T03:29:04Z Using RdRand as an additional entropy source
2020-08-25T03:29:04Z Using 16 MiB out of 32/2 requested for signature cache, able to store 524288 elements
2020-08-25T03:29:04Z Using 16 MiB out of 32/2 requested for script execution cache, able to store 524288 elements
2020-08-25T03:29:04Z Loaded best chain: hashBestChain=0fff88f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e22ff height=0 date=2011-02-02T23:16:42Z progress=1.000000
2020-08-25T03:29:04Z block tree size = 1
2020-08-25T03:29:04Z nBestHeight = 0
2020-08-25T03:29:04Z Imported mempool transactions from disk: 0 succeeded, 0 failed, 0 expired, 0 already there, 0 waiting for initial broadcast
2020-08-25T03:29:04Z 0 addresses found from DNS seeds
```
With `-logthreadnames` and `-logfunctionnames`:
```
$ src/bitcoind -regtest -logthreadnames -logfunctionnames
2020-08-25T03:29:04Z [init] [ReportHardwareRand] Using RdRand as an additional entropy source
2020-08-25T03:29:04Z [init] [InitSignatureCache] Using 16 MiB out of 32/2 requested for signature cache, able to store 524288 elements
2020-08-25T03:29:04Z [init] [InitScriptExecutionCache] Using 16 MiB out of 32/2 requested for script execution cache, able to store 524288 elements
2020-08-25T03:29:04Z [init] [LoadChainTip] Loaded best chain: hashBestChain=0fff88f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e22ff height=0 date=2011-02-02T23:16:42Z progress=1.000000
2020-08-25T03:29:04Z [init] [AppInitMain] block tree size = 1
2020-08-25T03:29:04Z [init] [AppInitMain] nBestHeight = 0
2020-08-25T03:29:04Z [loadblk] [LoadMempool] Imported mempool transactions from disk: 0 succeeded, 0 failed, 0 expired, 0 already there, 0 waiting for initial broadcast
2020-08-25T03:29:04Z [dnsseed] [ThreadDNSAddressSeed] 0 addresses found from DNS seeds
```
ACKs for top commit:
laanwj:
Code review ACK b4511e2e2e
MarcoFalke:
review ACK b4511e2e2e🌃
Tree-SHA512: d100f5364630c323f31d275259864c597f7725e462d5f4bdedcc7033ea616d7fc0d16ef1b2af557e692f4deea73c6773ccfc681589e7bf6ba970b9ec169040c7
84716b134e Add "index/blockfilterindex -> validation -> index/blockfilterindex" to expected circular dependencies (Jonas Schnelli)
ab3a0a2fb9 Add functional test for blockfilterindex in prune-mode (Jonas Schnelli)
c286a22f7b Add debug startup parameter -fastprune for more effective pruning tests (Jonas Schnelli)
5e112269c3 Avoid pruning below the blockfilterindex sync height (Jonas Schnelli)
00d57ff768 Avoid accessing nullpointer in BaseIndex::GetSummary() (Jonas Schnelli)
6abe9f5b11 Allow blockfilter in conjunction with prune (Jonas Schnelli)
Pull request description:
Maintaining the blockfilterindexes in prune mode is possible and may lead to efficient p2p based rescans of wallets (restore backups, import/sweep keys) beyond the prune height (rescans not part of that PR).
This PR allows running the blockfilterindex(es) in conjunction with pruning.
* Bitcoind/Qt will shutdown during startup when missing block data has been detected ([re]enable `-blockfilterindex` when we already have pruned)
* manual block pruning is disabled during blockfilterindex sync
* auto-pruning is delayed during blockfilterindex sync
ToDos:
* [x] Functional tests
ACKs for top commit:
fjahr:
Code review ACK 84716b1
ryanofsky:
Code review ACK 84716b134e. Only changes since last review were suggested new FindFilesToPrune argument and test.
benthecarman:
tACK 84716b134e
Tree-SHA512: 91d832c6c562c463f7ec7655c08956385413a99a896640b9737bda0183607fac530435d03d87c3c0e70c61ccdfe73fe8f3639bc7d26d33ca7e60925ebb97d77a
std::chrono::system_clock.time_since_epoch and time_t(0) are not guaranteed
to use the Unix epoch timestamp, but in practice they almost certainly will.
Any differing behavior will be assumed to be an error, unless certain
platforms prove to consistently deviate, at which point we'll cope with it
by adding offsets.
Do a quick runtime check to verify that
time_t(0) == std::chrono::system_clock's epoch time == unix epoch.
Co-authored-by: Anthony Towns <aj@erisian.com.au>
96635e6177 init: use GetNetworkNames() in -onlynet help (Jon Atack)
0dbde700a6 rpc: use GetNetworkNames() in getnetworkinfo and getpeerinfo helps (Jon Atack)
1c3af37881 net: create GetNetworkNames() (Jon Atack)
b45eae4d53 net: update NET_UNROUTABLE to not_publicly_routable in GetNetworkName() (Jon Atack)
Pull request description:
per the IRC discussion today at http://www.erisian.com.au/bitcoin-core-dev/log-2021-01-19.html#l-87
- return a more helpful string name for `Network::NET_UNROUTABLE`: "not_publicly_routable" instead of "unroutable"
- update the RPC getpeerinfo "network" help, and automate it and the getnetworkinfo "network#name" and the -onlynet help doc generation
ACKs for top commit:
theStack:
re-ACK 96635e6177🌳
MarcoFalke:
review ACK 96635e6177🐗
Tree-SHA512: 511a7d987126b48a7a090739aa7c4964b6186a3ff8f5f7eec9233dd816c6b7a6dc91b3ea6b824aa68f218a8a3ebdc6ffd214e9a88af38f2bf23f3257c4284c3a
eecb7ab105 [doc] clarify -peertimeout and -timeout descriptions (gzhao408)
Pull request description:
The debug-only option `-peertimeout` is used to delay `InactivityCheck()`, whereas the `-timeout` option specifies socket timeouts (`nConnectTimeout`). The current descriptions are a bit misleading and hard to tell apart. I think it would save dev/review time to update them 🤷
ACKs for top commit:
MarcoFalke:
ACK eecb7ab105 nice doc fixup
jnewbery:
ACK eecb7ab105
Tree-SHA512: 71d2e6c31664b9f7f0b053ecf3be21c6c55472553fa7478d8526ba3be8d54979bceafca63d87b8b2488c11f409c332ac795da613ff8101546b18d9cd8bcceb50
572fd0f738 doc: More precise -debug and -debugexclude doc (wodry)
Pull request description:
I wondered how one could enable debug logging with `-debug=<category>` for multiple categories. Found out solution is to specify that option multiple times for each wanted category.
This PR documents this behavior and uses the same wording for the same behavior of `-debugexclude=<category>` to make that also clear and stringent.
ACKs for top commit:
laanwj:
ACK 572fd0f738
MarcoFalke:
ACK 572fd0f738
theStack:
ACK 572fd0f738
Tree-SHA512: 8d93db37602fd5ff4247e7c11478e55b99c0e3d47eaa2bb901937805d8f2a466b3a198b713b760981c5411576b74c52e2909c46c6d3f2e0e04215fd521b65cf7
bff7c66e67 Add documentation to contrib folder (Troy Giorshev)
381f77be85 Add Message Capture Test (Troy Giorshev)
e4f378a505 Add capture parser (Troy Giorshev)
4d1a582549 Call CaptureMessage at appropriate locations (Troy Giorshev)
f2a77ff97b Add CaptureMessage (Troy Giorshev)
dbf779d5de Clean PushMessage and ProcessMessages (Troy Giorshev)
Pull request description:
This PR introduces per-peer message capture into Bitcoin Core. 📓
## Purpose
The purpose and scope of this feature is intentionally limited. It answers a question anyone new to Bitcoin's P2P protocol has had: "Can I see what messages my node is sending and receiving?".
## Functionality
When a new debug-only command line argument `capturemessages` is set, any message that the node receives or sends is captured. The capture occurs in the MessageHandler thread. When receiving a message, it is captured as soon as the MessageHandler thread takes the message off of the vProcessMsg queue. When sending, the message is captured just before the message is pushed onto the vSendMsg queue.
The message capture is as minimal as possible to reduce the performance impact on the node. Messages are captured to a new `message_capture` folder in the datadir. Each node has their own subfolder named with their IP address and port. Inside, received and sent messages are captured into two binary files, msgs_recv.dat and msgs_sent.dat, like so:
```
message_capture/203.0.113.7:56072/msgs_recv.dat
message_capture/203.0.113.7:56072/msgs_sent.dat
```
Because the messages are raw binary dumps, included in this PR is a Python parsing tool to convert the binary files into human-readable JSON. This script has been placed on its own and out of the way in the new `contrib/message-capture` folder. Its usage is simple and easily discovered by the autogenerated `-h` option.
## Future Maintenance
I sympathize greatly with anyone who says "the best code is no code".
The future maintenance of this feature will be minimal. The logic to deserialize the payload of the p2p messages exists in our testing framework. As long as our testing framework works, so will this tool.
Additionally, I hope that the simplicity of this tool will mean that it gets used frequently, so that problems will be discovered and solved when they are small.
## FAQ
"Why not just use Wireshark"
Yes, Wireshark has the ability to filter and decode Bitcoin messages. However, the purpose of the message capture added in this PR is to assist with debugging, primarily for new developers looking to improve their knowledge of the Bitcoin Protocol. This drives the design in a different direction than Wireshark, in two different ways. First, this tool must be convenient and simple to use. Using an external tool, like Wireshark, requires setup and interpretation of the results. To a new user who doesn't necessarily know what to expect, this is unnecessary difficulty. This tool, on the other hand, "just works". Turn on the command line flag, run your node, run the script, read the JSON. Second, because this tool is being used for debugging, we want it to be as close to the true behavior of the node as possible. A lot can happen in the SocketHandler thread that would be missed by Wireshark.
Additionally, if we are to use Wireshark, we are at the mercy of whoever it maintaining the protocol in Wireshark, both as to it being accurate and recent. As can be seen by the **many** previous attempts to include Bitcoin in Wireshark (google "bitcoin dissector") this is easier said than done.
Lastly, I truly believe that this tool will be used significantly more by being included in the codebase. It's just that much more discoverable.
ACKs for top commit:
MarcoFalke:
re-ACK bff7c66e67 only some minor changes: 👚
jnewbery:
utACK bff7c66e67
theStack:
re-ACK bff7c66e67
Tree-SHA512: e59e3160422269221f70f98720b47842775781c247c064071d546c24fa7a35a0e5534e8baa4b4591a750d7eb16de6b4ecf54cbee6d193b261f4f104e28c15f47
I wondered how one could enable debug logging with `-debug=<category>` for multiple categories. Found out solution is to specify that option multiple times for each wanted category.
This PR documents this behavior and uses the same wording for the same behavior of `-debugexclude=<category>` to make that also clear and stringent.
dc8be12510 refactor: remove boost::thread_group usage (fanquake)
Pull request description:
Post #18710, there isn't much left using `boost::thread_group`, so should just be able to replace it with the standard library. This also removes the last use of `boost::thread_interrupted`.
After this change, last piece of Boost Thread we'd be using is `boost::shared_mutex`. See the commentary [here](https://github.com/bitcoin/bitcoin/issues/16684#issuecomment-726214696) as to why it may be non-trivial to swap that for `std::shared_mutex` in the near future.
Closes#17307
ACKs for top commit:
laanwj:
Code review re-ACK dc8be12510
MarcoFalke:
review ACK dc8be12510🔁
jonatack:
Non-expert code review ACK dc8be12510, also checked range-diff since last review and that local debug build is clean with gcc 10.2.1-6 on Debian
Tree-SHA512: 5510e2d760cce824234207dc86b1551ca8f21cbf3a2ce753c0254a0d03ffd83c94e449aec202fb7bd76e6fc64df783a6b70a736b0add9ece3734bb9c8ce8fc2f
67c9a83df1 style-only: Remove redundant sentence in ActivateBestChain comment (Carl Dong)
b8e95658d5 style-only: Make TestBlockValidity signature readable (Carl Dong)
0cdad75390 validation: Use accessible chainstate in ChainstateManager::ProcessNewBlock (Carl Dong)
ea4fed9021 validation: Use existing chainstate in ChainstateManager::ProcessNewBlockHeaders (Carl Dong)
e0dc305727 validation: Move LoadExternalBlockFile to CChainState (Carl Dong)
5f8cd7b3a5 validation: Remove global ::ActivateBestChain (Carl Dong)
2a696472a1 validation: Pass in chainstate to ::NotifyHeaderTip (Carl Dong)
9c300cc8b3 validation: Pass in chainstate to TestBlockValidity (Carl Dong)
0e17c833cd validation: Make CChainState.m_blockman public (Carl Dong)
d363d06bf7 validation: Pass in blockman to ContextualCheckBlockHeader (Carl Dong)
f11d11600d validation: Move GetLastCheckpoint to BlockManager (Carl Dong)
e4b95eefbc validation: Move GetSpendHeight to BlockManager (Carl Dong)
b026e318c3 validation: Move FindForkInGlobalIndex to BlockManager (Carl Dong)
3664a150ac validation: Remove global LookupBlockIndex (Carl Dong)
eae54e6e60 scripted-diff: Use BlockManager::LookupBlockIndex (Carl Dong)
15d20f40e1 validation: Move LookupBlockIndex to BlockManager (Carl Dong)
f92dc6557a validation: Guard the active_chainstate with cs_main (Carl Dong)
Pull request description:
Overall PR: #20158 (tree-wide: De-globalize ChainstateManager)
Note to reviewers:
1. This bundle may _apparently_ introduce usage of `g_chainman` or `::Chain(state|)Active()` globals, but these are resolved later on in the overall PR. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
2. There may be seemingly obvious local references to `ChainstateManager` or other validation objects which are not being used in callers of the current function in question, this is done intentionally to **_keep each commit centered around one function/method_** to ease review and to make the overall change systematic. We don't assume anything about our callers. Rest assured that once we are considering that particular caller in later commits, we will use the obvious local references. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
3. When changing a function/method that has many callers (e.g. `LookupBlockIndex` with 55 callers), it is sometimes easier (and less error-prone) to use a scripted-diff. When doing so, there will be 3 commits in sequence so that every commit compiles like so:
1. Add `new_function`, make `old_function` a wrapper of `new_function`, divert all calls to `old_function` to `new_function` **in the local module only**
2. Scripted-diff to divert all calls to `old_function` to `new_function` **in the rest of the codebase**
3. Remove `old_function`
ACKs for top commit:
jnewbery:
utACK 67c9a83df1
laanwj:
re-ACK 67c9a83df1
ryanofsky:
Code review ACK 67c9a83df1. Changes since last review:
Tree-SHA512: 8744aba2dd57a40cd2fedca809b0fe24d771bc60da1bffde89601999384aa0df428057a86644a3f72fbeedbc8b04db6c4fd264ea0db2e73c279e5acc6d056cbf
[META] This commit should be followed up by removing the comments and
assertions meant only to show that the change is correct.
LoadExternalBlockFile mainly acts on CChainState.
[META] In a previous commit, we moved ::LookupBlockIndex to become a
member function of BlockManager. This commit is split out from
that one since it can be expressed nicely as a scripted-diff.
-BEGIN VERIFY SCRIPT-
find_regex='LookupBlockIndex' \
&& git grep -l -E "$find_regex" -- src \
| grep -v '^src/validation\.\(cpp\|h\)$' \
| xargs sed -i -E "s@${find_regex}@g_chainman.m_blockman.LookupBlockIndex@g"
-END VERIFY SCRIPT-
bb6fcc75d1 refactor: Drop boost::thread stuff in CCheckQueue (Hennadii Stepanov)
6784ac471b bench: Use CCheckQueue local thread pool (Hennadii Stepanov)
dba30695fc test: Use CCheckQueue local thread pool (Hennadii Stepanov)
01511776ac Add local thread pool to CCheckQueue (Hennadii Stepanov)
0ef938685b refactor: Use member initializers in CCheckQueue (Hennadii Stepanov)
Pull request description:
This PR:
- gets rid of `boost::thread_group` in the `CCheckQueue` class
- allows thread safety annotation usage in the `CCheckQueue` class
- is alternative to #14464 (https://github.com/bitcoin/bitcoin/pull/18710#issuecomment-616618525, https://github.com/bitcoin/bitcoin/pull/18710#issuecomment-617291612)
Also, with this PR (I hope) it could be easier to resurrect a bunch of brilliant ideas from #9938.
Related: #17307
ACKs for top commit:
laanwj:
Code review ACK bb6fcc75d1
LarryRuane:
ACK bb6fcc75d1
jonatack:
Code review ACK bb6fcc75d1 and verified rebase to master builds cleanly with unit/functional tests green
Tree-SHA512: fddeb720d5a391b48bb4c6fa58ed34ccc3f57862fdb8e641745c021841c8340e35c5126338271446cbd98f40bd5484f27926aa6c3e76fa478ba1efafe72e73c1
This commit adds the CaptureMessage function. This will later be called
when any message is sent or received. The capture directory is fixed,
in a new folder "message_capture" in the datadir. Peers will then have
their own subfolders, named with their IP address and port, replacing
colons with underscores to keep compatibility with Windows. Inside,
received and sent messages will be captured into two binary files,
msgs_recv.dat and msgs_sent.dat.
e.g.
message_capture/203.0.113.7_56072/msgs_recv.dat
message_capture/203.0.113.7_56072/msgs_sent.dat
The format has been designed as to result in a minimal performance
impact. A parsing script is added in a later commit.
-dropmessagestest is a command line option that causes 1 in n received
messages to be dropped. The Bitcoin P2P protocol is stateful and in
general cannot handle messages being dropped. Dropped
version/verack/ping/pong messages will cause the connection to time out
and be torn down. Other dropped messages may also cause the peer to
believe that the peer has stalled and tear down the connection.
It seems difficult to uncover any actual issues with -dropmessagestest,
and any coverage that could be generated would probably be easier to
trigger with fuzz testing.
010eed3ce0 doc: warn that incoming conns are unlikely when not using default ports (Adam Jonas)
Pull request description:
Closes#5150.
This was mostly copied from #5285 by sulks, who has since quit GitHub.
The issue has remained open for 6 years, but the extra explanation still seems useful.
ACKs for top commit:
laanwj:
re-ACK 010eed3ce0
Tree-SHA512: d240fb06bba41ad8898ced59356c10adefc09f3abb33e277f8e2c5980b40678f2d237f286b476451bb29d2b94032a7dee2ada3b2efe004ed1c2509e70b48e40f
cd03513dc2 init: Signal-safe instant shutdown (Wladimir J. van der Laan)
Pull request description:
Replace the 200ms polling loop with a faster and more efficient waiting operation. This should speed up short RPC tests.
This change has been tried a few times before, but abandoned every time because solutions used a condition variable which is not safe for use in signals, as they need to be reentrant.
On UNIX-ish OSes, use a safe way: a pipe. When shutdown is requested write a dummy byte to the pipe. Waiting for shutdown is a matter of a blocking read from the pipe.
On Windows, there are no signals so using a condition variable is safe.
This only affects bitcoind. The GUI is unaffected by this change, and keeps polling as before in `BitcoinGUI::detectShutdown()`. It might be possible to listen to a pipe there, too, but I'm not sure, and it's complicated by the GUI-node abstraction.
ACKs for top commit:
jonatack:
ACK cd03513dc2 tested on Debian 5.9.11-1 (2020-11-27) x86_64 GNU/Linux
Tree-SHA512: ed2f532f69fec4855c17bf7b8f3d0eb96e78ee2a3c13d374dd2c6add06e3ad6a190da8ed8f9d7a76532cf998222d67f57e35b206aec29675e96437448ae7e13c
Replace the 200ms polling loop with a faster and more efficient waiting
operation.
This was tried a few times before, but given up every time because
solutions use a condition variable which is not safe for use in signals
as they need to be reentrant.
On UNIX-ish OSes, use a safe way: a pipe. When shutdown is requested
write a dummy byte to the pipe. Waiting for shutdown is a matter of a
blocking read from the pipe.
On Windows, there are no signals so using a condition variable is safe.
It's not actually possible to change this value, so remove the
indirection of it being a conn option.
DEFAULT_MAX_UPLOAD_TIMEFRAME is a compile time constant.
4e28753f60 feestimator: encapsulate estimation file logic (Antoine Poinsot)
e8ea6ad9c1 init: don't create a CBlockPolicyEstimator if we don't relay transactions (Antoine Poinsot)
86ff2cf202 Remove the remaining fee estimation globals (Antoine Poinsot)
03bfeee957 interface: remove unused estimateSmartFee method from node (Antoine Poinsot)
Pull request description:
If the `blocksonly` mode is turned on after running with transaction
relay enabled for a while, the fee estimation will serve outdated data
to both the internal wallet and to external applications that might be
feerate-sensitive and make use of `estimatesmartfee` (for example a
Lightning Network node).
This has already caused issues (for example https://github.com/bitcoin/bitcoin/issues/16840 (C-lightning), or https://github.com/lightningnetwork/lnd/issues/2562 (LND)) and it seems prudent to fail rather than to give inaccurate values.
This fixes#16840, and closes#16890 which tried to fix the symptoms (RPC) but not the cause as mentioned by sdaftuar :
> If this is a substantial problem, then I would think we should take action to protect our own wallet users as well (rather than hide the results of what our fee estimation would do!).
ACKs for top commit:
MarcoFalke:
re-ACK 4e28753f60👋
jnewbery:
utACK 4e28753f60
Tree-SHA512: c869cf03b86d8194002970bbc84662dae76874967949b9be0d9a4511a1eabcb1627c38aca3154da9dcece1a4c49ec02bd4f9fcca2ec310986e07904559e63ba8
This moves the fee_estimates file management to the CBlockPolicyEstimator
Flush() method.
Co-authored-by: John Newbery <john@johnnewbery.com>
Signed-off-by: Antoine Poinsot <darosior@protonmail.com>
This moves the CBlockPolicyEstimator to the NodeContext, which get rids
of two globals and allows us to conditionally create the
CBlockPolicyEstimator (and to remove a circular dep).
Signed-off-by: Antoine Poinsot <darosior@protonmail.com>
f15e780b9e refactor: Clean up CTxMemPool initializer list (Elle Mouton)
e3310692d0 refactor: Make CTxMemPool::m_check_ratio a const and a constructor argument (Elle Mouton)
9d4b4b2c2c refactor: Avoid double to int cast for nCheckFrequency (Elle Mouton)
Pull request description:
This PR cleans up the CTxMemPool interface by including the ratio used to determine when a mempool sanity check should run in the constructor of CTxMempool instead of using nCheckFrequency which required a cast from a double to a uint32_t. Since nCheckFrequency (now called m_check_ratio) is set in the constructor and only every read from there after, it can be turned into a const and no longer needs to be guarded by the 'cs' lock.
Since nCheckFrequency/m_check_ratio no longer needs to lock the 'cs' mutux, mutex lock line in the "CTxMempool::check" function can be moved below where the m_check_ratio variable is checked. Since the variable is 0 by default (meaning that "CTxMempool::check" will most likely not run its logic) this saves us from unnecessarily grabbing the lock.
ACKs for top commit:
jnewbery:
utACK f15e780b9e
MarcoFalke:
ACK f15e780b9e👘
glozow:
utACK f15e780b9e
theStack:
Code Review ACK f15e780b9e
Tree-SHA512: d83f3b5311ca128847b621e5e999c7e1bf0f4e6261d4cc090fb13e229a0f7eecd66ad997f654f50a838baf708d1515740aa3bffc244909a001d01fd5ae398b68
