Since m_check_ratio is only set once and since the CTxMemPool object is
no longer a global variable, m_check_ratio can be passed into the
constructor of CTxMemPool. Since it is only read from after
initialization, m_check_ratio can also be made a const and hence no
longer needs to be guarded by the cs mutex.
56a461f72796ca60de28e78f144741eb1a4f5213 wallet: fix buffer over-read in SQLite file magic check (Sebastian Falbesoner)
Pull request description:
Looking at our new SQLite database code, I noticed that there is a potential problem in the method `IsSQLiteFile()`: If there is no terminating zero within the first 16 bytes of the file, the `magic` buffer would be over-read in the `std::string` constructor for `magic_str`. Fixed by using the "from buffer" variant of the string ctor (that also takes a size) rather than the "from c-string" variant (see http://www.cplusplus.com/reference/string/string/string/).
The behaviour can be reproduced by the following steps:
* Creating a file of at least 512 bytes in size (to pass the minimum size check) that doesn't contain zero bytes in the magic area, e.g. simply:
`$ python3 -c "print('A'*512)" > /tmp/corrupt_wallet`
* Showing content and size of the `magic_str` string in case the magic check fails
* Create a simple unit test that simply calls `IsSQLiteFile` with the corrupt wallet file
* Run the unit test and see the random gibberish output of `magic_str` after 16 `A`s :-)
Or, TLDR variant, just get the branch https://github.com/theStack/bitcoin/tree/reproduce_sqlite_magic_overread, compile unit Tests and run the script `./reproduce_sqlite_magic_overread.sh`.
Note that this is the minimal diff, probably it would be better to avoid `std::string` at all in this case and just use `memcmp`, strings that include null bytes are pretty confusing.
ACKs for top commit:
promag:
Code review ACK 56a461f72796ca60de28e78f144741eb1a4f5213.
practicalswift:
ACK 56a461f72796ca60de28e78f144741eb1a4f5213: patch looks correct
achow101:
ACK 56a461f72796ca60de28e78f144741eb1a4f5213
Tree-SHA512: a7aadd4d38eb92337e6281df2980f4bde744dbb6cf112b9cd0f2cab8772730e302db9123a8fe7ca4e7e844c47e68957487adb2bed4518c40b4bed6a69d7922b4
If there is no terminating zero within the 16 magic bytes, the buffer would be
over-read in the std::string constructor. Fixed by using the "from buffer"
variant of the ctor (that also takes a size) rather than the "from c-string"
variant.
fa4074b395a47c54069bd9f598244701505ff11d Show name, format and if uses descriptors in bitcoin-wallet tool (Jonas Schnelli)
Pull request description:
ACKs for top commit:
MarcoFalke:
ACK fa4074b395a47c54069bd9f598244701505ff11d
jonatack:
re-ACK fa4074b395a47c54069bd9f598244701505ff11d
Tree-SHA512: cf6ee96ff21532fc4b0ba7a0fdfdc1fa485c9b1495447350fe65cd0bd919e0e0280613933265cdee069b8c29ccf015ac374535a70cac3d4fb89f4d08b3a03519
If `-logips -debug=net` is specified then we print the contents of the
version message we send to the peer, including his address. Because the
addresses in the version message use pre-BIP155 encoding they cannot
represent a Tor v3 address and we would actually send 16 `0`s instead (a
dummy IPv6 address). However we would print the full address in the log
message. Before this fix:
```
2020-10-21T12:24:17Z send version message: version 70016, blocks=653500, us=[::]:0, them=xwjtp3mj427zdp4tljiiivg2l5ijfvmt5lcsfaygtpp6cw254kykvpyd.onion:8333, peer=0
```
This is confusing because we pretend to send one thing while we actually
send another. Adjust the printout to reflect what we are sending. After
this fix:
```
2020-10-21T12:26:54Z send version message: version 70016, blocks=653500, us=[::]:0, them=[::]:0, peer=0
```
2d5793c0161902730cde384dbdf3e3ba3e55c9e0 Bugfix: chainparams: Add missing (disabled) Taproot deployment for Signet (Luke Dashjr)
Pull request description:
Is there a way we can trigger compiler warnings if a deployment is undefined?
ACKs for top commit:
decryp2kanon:
utACK 2d5793c0161902730cde384dbdf3e3ba3e55c9e0
MarcoFalke:
review ACK 2d5793c0161902730cde384dbdf3e3ba3e55c9e0
Tree-SHA512: 135cefae0f8dc552b0f682c2b87cabca7a4716290a36410a55968850e803a5049234e3cc597c8ef8d7917ae5d5ea3fb851e160df171b6793114c6bc01c5ea3e7
624bab00dd2cc8e2ebd77dc0a669bc8d507c3721 test: add coverage for getwalletinfo format field (Jon Atack)
5e737a009234cbd7cf53748d3d28a2da5221192f rpc, wallet: Expose database format in getwalletinfo (João Barbosa)
Pull request description:
Support for sqlite based wallets was added in #19077. This PR adds the `format` key in `getwalletinfo` response, that can be `bdb` or `sqlite`.
ACKs for top commit:
jonatack:
Tested ACK 624bab00dd2cc8e2ebd77dc0a669bc8d507c3721
laanwj:
Code review ACK 624bab00dd2cc8e2ebd77dc0a669bc8d507c3721.
MarcoFalke:
doesn't hurt ACK 624bab00dd2cc8e2ebd77dc0a669bc8d507c3721
hebasto:
ACK 624bab00dd2cc8e2ebd77dc0a669bc8d507c3721, tested on Linux Mint 20 (x86_64).
meshcollider:
utACK 624bab00dd2cc8e2ebd77dc0a669bc8d507c3721
Tree-SHA512: a81f8530f040f6381d33e073a65f281993eccfa717424ab6e651c1203cbaf27794dcb7175570459e7fdaa211565bc060d0a3ecbe70d2b6f9c49b8d5071e4441c
c8abbc9d1fd8f77b5dcf31cf7a6dd6aac5d1c75c p2p: declare Announcement::m_state as uint8_t, add getter/setter (Jon Atack)
Pull request description:
Change `Announcement::m_state` in `tx_request.cpp` from type `State` to `uint8_t` and add a getter and setter for the conversion to/from `State`. This should silence these travis ci gcc compiler warnings:
```
txrequest.cpp:73:21: warning: ‘{anonymous}::Announcement::m_state’ is
too small to hold all values of ‘enum class {anonymous}::State’
State m_state : 3;
^
```
The gcc warnings are based on the maximum value held by the underlying uint8_t enumerator type, even though the intention of the bitfield declaration is the maximum declared enumerator value. They have apparently been silenced in gcc 8.4+ and 9.3+ according to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
ACKs for top commit:
sipa:
utACK c8abbc9d1fd8f77b5dcf31cf7a6dd6aac5d1c75c
ajtowns:
ACK c8abbc9d1fd8f77b5dcf31cf7a6dd6aac5d1c75c -- quick code review
hebasto:
ACK c8abbc9d1fd8f77b5dcf31cf7a6dd6aac5d1c75c, tested on Bionic (x86_64, gcc 7.5.0):
Tree-SHA512: 026721dd7a78983a72da77638d3327d2b252bef804e489278a852f000046c028d6557bbd6c2b4cea391d4e01f9264a1be842d502047cb90b2997cc37bee59e61
fa48405ef84985e5a9d38ec38e90d16596ea45b5 Warn on unknown rw_settings (MarcoFalke)
Pull request description:
Log a warning to debug log if unknown settings are encountered. This should probably only ever happen when the software is upgraded.
Something similar is already done for the command line and config file. See:
* test: Add test for unknown args #16234 (commit fa7dd88b71a1c6641bd450fae29a4a31849b1afd)
ACKs for top commit:
ryanofsky:
Code review ACK fa48405ef84985e5a9d38ec38e90d16596ea45b5. Looks good and I could see this being helpful for debugging. Thanks for taking suggestions
Tree-SHA512: cec7d88adf84fa0a842f56b26245157736eb50df433db951e622ea07fd145b899822b24cdab1d8b36c066415ce4f0ef09b493fa8a8d691532822a59c573aafa7
76bbcc414f3001b16ac0101f738ed0b3e6f1a372 test: Fix -Wunused-function warning if configured --without-libs (Hennadii Stepanov)
Pull request description:
On master (80c8a02f1b4f6ad2b5c02595d66a74db22373ed4) compiling with gcc:
```
$ ./configure --without-libs
$ make clean && make
...
test/script_tests.cpp:1369:23: warning: ‘CScriptWitness script_tests::ScriptWitnessFromJSON(const UniValue&)’ defined but not used [-Wunused-function]
1369 | static CScriptWitness ScriptWitnessFromJSON(const UniValue& univalue)
| ^~~~~~~~~~~~~~~~~~~~~
test/script_tests.cpp:1357:28: warning: ‘std::vector<CTxOut> script_tests::TxOutsFromJSON(const UniValue&)’ defined but not used [-Wunused-function]
1357 | static std::vector<CTxOut> TxOutsFromJSON(const UniValue& univalue)
| ^~~~~~~~~~~~~~
test/script_tests.cpp:1350:28: warning: ‘CMutableTransaction script_tests::TxFromHex(const string&)’ defined but not used [-Wunused-function]
1350 | static CMutableTransaction TxFromHex(const std::string& str)
| ^~~~~~~~~
...
```
This change is move-only (nice to review with `git diff --color-moved`).
ACKs for top commit:
practicalswift:
ACK 76bbcc414f3001b16ac0101f738ed0b3e6f1a372: diff looks correct
fanquake:
ACK 76bbcc414f3001b16ac0101f738ed0b3e6f1a372 - verified that this fixes the warnings. As mentioned can be reviewed with `git diff HEAD~ --color-moved=dimmed_zebra`.
Tree-SHA512: 7799ac190d1e3f15e38b36cfcd1f8d138be80cab6c6cfad8f7828e07deffc2037d52f1d967f7f233a3a8ed74eee184f5275076c2f364c3e363c77a1f40aa5030
bd5215103eb3985c1622eddea45a040e6173829c random: fixes read buffer resizing in RandAddSeedPerfmon (Ethan Heilman)
Pull request description:
As shown below when resizing the read buffer `vData` `std::max((vData.size() * 3) / 2, nMaxSize)` is used. This means that the buffer size immediately jumps to `nMaxSize`. I believe the intend of this code is to grow the buffer size through several steps rather than immediately resize it to the max size.
```cpp
std::vector<unsigned char> vData(250000, 0);
long ret = 0;
unsigned long nSize = 0;
const size_t nMaxSize = 10000000; // Bail out at more than 10MB of performance data
while (true) {
nSize = vData.size();
ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", nullptr, nullptr, vData.data(), &nSize);
if (ret != ERROR_MORE_DATA || vData.size() >= nMaxSize)
break;
vData.resize(std::max((vData.size() * 3) / 2, nMaxSize)); // Grow size of buffer exponentially
}
```
vData always starts at size 250,000 and nMaxSize is always 10,000,000 so the first time this line is reached:
```cpp
vData.resize(std::max((vData.size() * 3) / 2, nMaxSize));
```
the effect will always be to resize vData to nMaxSize. Then because the loop terminates when vData.size >= 10,000,000 only one resize operation will take place.
To fix this issue we replace `std::min` with `std::max`
This PR also adds a comment clarifying the behavior of this function the first time it is called.
ACKs for top commit:
fanquake:
ACK bd5215103eb3985c1622eddea45a040e6173829c - thanks for taking a look at this Ethan. Swapping from `std::max` to `std::min` here certainly seems correct.
Tree-SHA512: 7c65f700e5bbe44bc2f1ffdcdc99ec19c542894c95b5ee9791facd09d02afae88d1f8f35af129719e4860db94bc790856e7adb1d218a395381e7c2913b95f1d0
95fedd33a23d6cb7542378afef229965f1ebfd68 refactor: Clean up -Wlogical-op warning (maskoficarus)
Pull request description:
This is a quick patch that fixes#19912 . This change prevents a -Wlogical-op warning that occurs because we're treating a const int value as a boolean. There's no sense checking if a non-zero constant has a value, so I've removed the check.
#18836 also addresses the same warning, but has a larger scope and will require more review. This pull request will act as a patch to prevent this compile warning until 18836 is merged.
ACKs for top commit:
MarcoFalke:
review ACK 95fedd33a23d6cb7542378afef229965f1ebfd68
hebasto:
ACK 95fedd33a23d6cb7542378afef229965f1ebfd68, tested on Linux Mint 20 (x86_64):
Tree-SHA512: 13a9d7f7cb472f4c22a01ca2f9771a75267ff769bdae9d0dc6b2c7f3b05369f6dfa859be2b172b39c15ede6c44cddf556380b3565e42850faa65ccd3fe6e175b
da0988daf1d665a4644ad3f1ddf3f8a8bdd88cde scripted-diff: rename vRecvGetData (Neha Narula)
ba951812ec0cc8ebee5911a582f188525b76ff0a Guard vRecvGetData (now in net processing) with its own mutex (Neha Narula)
2d9f2fca43aadcdda4d644cddab36dca88b40b97 Move vRecvGetData to net processing (Neha Narula)
673247b58cd1252ab7e99f7d63ead05cc100cef2 Lock before checking if orphan_work_set is empty; indicate it is guarded (Neha Narula)
8803aee66813d27ddbdfce937ab9c35f8f7c35bc Move m_orphan_work_set to net_processing (Neha Narula)
9c47cb29f9f525ee58acc629825a97075156d764 [Rename only] Rename orphan_work_set to m_orphan_work_set. (Neha Narula)
Pull request description:
Add annotations to guard `vRecvGetData` and `orphan_work_set` and fix up places where they were accessed without a lock. There is no current data race because they happen to be accessed by only one thread, but this might not always be the case.
Original discussion: https://github.com/bitcoin/bitcoin/pull/18861#discussion_r451778445
ACKs for top commit:
MarcoFalke:
review ACK da0988daf1d665a4644ad3f1ddf3f8a8bdd88cde 🐬
jnewbery:
Code review ACK da0988daf1d665a4644ad3f1ddf3f8a8bdd88cde
hebasto:
ACK da0988daf1d665a4644ad3f1ddf3f8a8bdd88cde, I have reviewed the code and it looks correct, I agree it can be merged.
Tree-SHA512: 31cadd319ddc9273a87e77afc4db7339fd636e816b5e742eba5cb32927ac5cc07a672b2268d2d38a75a0f1b17d93836adab9acf7e52f26ea9a43f54efa57257e
51365674e828ae95477570019738ab32aa572241 script: Make ComputeEntrySchnorr and ComputeEntryECDSA const to clarify contract (practicalswift)
Pull request description:
Make `ComputeEntrySchnorr` and `ComputeEntryECDSA` `const` to clarify contract.
ACKs for top commit:
benthecarman:
ACK 51365674e828ae95477570019738ab32aa572241
theStack:
ACK 51365674e828ae95477570019738ab32aa572241 👌
sipa:
utACK 51365674e828ae95477570019738ab32aa572241
Tree-SHA512: 0f7a72bf6df7a97d21045ead9db398d2a9527c358aeeb894dec34a5386da4cc316e2f3326716e960ef8aa47bf73b99d1f92bb6d45dfa7871c84624bcad8a79f1
to silence these Travis CI GCC compiler warnings:
txrequest.cpp:73:21: warning: ‘{anonymous}::Announcement::m_state’ is
too small to hold all values of ‘enum class {anonymous}::State’
State m_state : 3;
^
The warnings are based on the maximum value held by the underlying uint8_t
enumerator type, though the intention of the bitfield declaration is the
maximum declared enumerator value.
The warning been silenced in GCC 8.4+ and 9.3+ according to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414
0d9d2a1f7c26dc9c7b233ea8c3182fe1f8936bca Only update the updateSmartFeeLabel once in sync (Jonas Schnelli)
Pull request description:
Calling `updateSmartFeeLabel` and therefore `estimateSmartFee` is pointless during IBD.
GUI freezes appear because `estimateSmartFee` competes with `processBlock` for the `m_cs_fee_estimator` lock leading to multiple seconds of blocking the GUI thread in `updateSmartFeeLabel`.
ACKs for top commit:
ryanofsky:
Code review ACK 0d9d2a1f7c26dc9c7b233ea8c3182fe1f8936bca. Clever fix. Didn't test but I remember I could reproduce the startup issue easily before by putting a sleep in estimateSmartFee.
promag:
Code review ACK 0d9d2a1f7c26dc9c7b233ea8c3182fe1f8936bca.
hebasto:
ACK 0d9d2a1f7c26dc9c7b233ea8c3182fe1f8936bca, tested on Linux Mint 20 (x86_64) with `QT_FATAL_WARNINGS=1` and `-debug=qt`.
Tree-SHA512: 85ec2266f06ddd7b523e24d2a462f10ed965d5b4d479005263056f81b7fe49996e1568dafb84658af406e9202ed3bfa846d59c10bb951e0f97cee230e30fafd5
33330778230961cfbf2a24de36b5877e395cc596 rpc: Adjust witness-tx deserialize error message (MarcoFalke)
cccc7525697e7b8d99b545e34f0f504c78ffdb94 rpc: Properly deserialize txs with witness before signing (MarcoFalke)
Pull request description:
Signing a transaction can only happen when the transaction has inputs. A transaction with inputs can always be deserialized as witness-transaction. If `try_no_witness` decoding is attempted, this will lead to rare intermittent failures.
Fixes#18803
ACKs for top commit:
achow101:
ACK 33330778230961cfbf2a24de36b5877e395cc596
ajtowns:
ACK 33330778230961cfbf2a24de36b5877e395cc596
Tree-SHA512: 73f8a5cdfe03fb0e68908d2fa09752c346406f455694a020ec0dd1267ef8f0a583b8e84063ea74aac127106dd193b72623ca6d81469a94b3f5b3c766ebf2c42b
41dca087b73a3627107603694f5a982ea2a53189 [trivial] Extract connection type doc into file where it is used. (Amiti Uttarwar)
3069b56a456d98fca7c4a4ccd329581bd1f0b853 [doc] Improve help for getpeerinfo connection_type field. (Amiti Uttarwar)
Pull request description:
two commits addressing small followups from #19725
* first commit adds a clarification in the release notes that this field shouldn't be expected to be stable (suggested by sdaftuar in https://github.com/bitcoin/bitcoin/pull/19725#issuecomment-697421878)
* second commit moves the `CONNECTION_TYPE_DOC` object out of the header file to reduce the size of the binary (suggested by MarcoFalke in https://github.com/bitcoin/bitcoin/pull/19725#discussion_r495467895, he tested and found a decrease of 10kB)
ACKs for top commit:
achow101:
ACK 41dca087b73a3627107603694f5a982ea2a53189
laanwj:
Code review ACK 41dca087b73a3627107603694f5a982ea2a53189
Tree-SHA512: a555df978b4341fbe05deeb40a8a655f0d3c5c1c0adcc1737fd2cf61b204a5a24a301ca0c2b5a3616554d4abf8c57074d22dbda5a50d8450bc22c57679424985
a490d074b3491427afbd677f5fa635b910f8bb34 doc: Add anchors.dat to files.md (Hennadii Stepanov)
0a85e5a7bc8dc6587963e2e37ac1b087a1fc97fe p2p: Try to connect to anchors once (Hennadii Stepanov)
5543c7ab285e90256cbbf9858249e028c9611cda p2p: Fix off-by-one error in fetching address loop (Hennadii Stepanov)
4170b46544231e7cf1d64ac3baa314083be37502 p2p: Integrate DumpAnchors() and ReadAnchors() into CConnman (Hennadii Stepanov)
bad16aff490dcf87722fbfe202a869fb24c734e1 p2p: Add CConnman::GetCurrentBlockRelayOnlyConns() (Hennadii Stepanov)
c29272a157d09a8125788c1b860e89b63b4cb36c p2p: Add ReadAnchors() (Hennadii Stepanov)
567008d2a0c95bd972f4031f31647c493d1bc2e8 p2p: Add DumpAnchors() (Hennadii Stepanov)
Pull request description:
This is an implementation of #17326:
- all (currently 2) outbound block-relay-only connections (#15759) are dumped to `anchors.dat` file
- on restart a node tries to connect to the addresses from `anchors.dat`
This PR prevents a type of eclipse attack when an attacker exploits a victim node restart to force it to connect to new, probably adversarial, peers.
ACKs for top commit:
jnewbery:
code review ACK a490d074b3
laanwj:
Code review ACK a490d074b3491427afbd677f5fa635b910f8bb34
Tree-SHA512: 0f5098a3882f2814be1aa21de308cd09e6654f4e7054b79f3cfeaf26bc02b814ca271497ed00018d199ee596a8cb9b126acee8b666a29e225b08eb2a49b02ddd
6272604bef3b409455b010d134b4b62c8f6ff49f refactor: enable -netinfo to add future networks (i2p, cjdns) (Jon Atack)
82fd40216c70037480150d2b62e2b58c57784546 refactor: promote some -netinfo localvars to class members (Jon Atack)
5133fab37e8679e1d0d08ead4f5cccf4979dc15b cli: simplify -netinfo using getpeerinfo network field (Jon Atack)
4938a109adf13f2c60a50f08d4cc9ddb8d7ded96 rpc, test: expose CNodeStats network in RPC getpeerinfo (Jon Atack)
6df7882029854f0427d84b22081018ae77e27e66 net: add peer network to CNodeStats (Jon Atack)
Pull request description:
This PR:
- builds on #19991 and #19998
- exposes peer networks via a new getpeerinfo `network` field ("ipv4", "ipv6", or "onion"), and adds functional tests
- updates -netinfo to use getpeerinfo `network` rather than detecting the peer networks client-side
- refactors -netinfo to easily add future networks
ACKs for top commit:
laanwj:
ACK 6272604bef3b409455b010d134b4b62c8f6ff49f
Tree-SHA512: 28883487585135ceaaf84ce09131f2336e3193407f2e3df0960e3f4ac340f500ab94ffecb9d06a4c49bc05e3cca4f914ea4379860bea0bd5df2f834f74616015
faad92fe1c3cca9795226bd167130976930ddab8 test: Remove unused nVersion=1 in p2p tests (MarcoFalke)
Pull request description:
After commit ddefb5c0b759950942ac03f28c43b548af7b4033 nVersion is no
longer used in p2p logic when sending messages. Only when receiving
messages, but in this test no messages are received.
ACKs for top commit:
laanwj:
Code review ACK faad92fe1c3cca9795226bd167130976930ddab8
fanquake:
ACK faad92fe1c3cca9795226bd167130976930ddab8
Tree-SHA512: 9a7029187aaa5a7929a4a2199646131ff1ea72df6a855ce7022dd3bb2647dd525356dbc5e460c77007eebcdeab400a689db8cb77e8239af3b539c117a4e0d16e
5b57dc5458800e56b4dddfeb32a1813804a62b0f RPC: getpeerinfo: Wrap long help line for bytesrecv_per_msg (Luke Dashjr)
d681a28219d3876a2b6e3cd2fb0d92963674903e RPC: getpeerinfo: Deprecate "whitelisted" field (replaced by "permissions") (Luke Dashjr)
Pull request description:
If we were going to continue support for "whitelisted", we should have probably made it true if any permission flag was set, rather than only if "default permissions" were used.
This corrects the description, and deprecates it.
ACKs for top commit:
laanwj:
ACK 5b57dc5458800e56b4dddfeb32a1813804a62b0f
Tree-SHA512: a2e2137f8be8110357c1b2fef2c923fa8c7c4a49b0b2b3a2d78aedf12f8ed5cc7e140018a21b37e6ec7770ed4007542aeef7ad4558973901b107e8e0f81d6003
886be97af5d4aba338b23a7b20b8560be8156231 Ignore incorrectly-serialized banlist.dat entries (Pieter Wuille)
883cea7dea3cedc9b45b6191f7d4e7be2d9a11ca Restore compatibility with old CSubNet serialization (Pieter Wuille)
Pull request description:
#19628 changed CSubNet for IPv4 netmasks, using the first 4 bytes of `netmask` rather than the last 4 to store the actual mask. Unfortunately, CSubNet objects are serialized on disk in banlist.dat, breaking compatibility with existing banlists (and bringing them into an inconsistent state where entries reported in `listbanned` cannot be removed).
Fix this by reverting to the old format (just for serialization). Also add a sanity check to the deserializer so that nonsensical banlist.dat entries are ignored (which would otherwise be possible if someone added IPv4 entries after #19628 but without this PR).
Reported by Greg Maxwell.
ACKs for top commit:
laanwj:
Code review ACK 886be97af5d4aba338b23a7b20b8560be8156231
vasild:
ACK 886be97af
Tree-SHA512: d3fb91e8ecd933406e527187974f22770374ee2e12a233e7870363f52ecda471fb0b7bae72420e8ff6b6b1594e3037a5115984c023dbadf38f86aeaffcd681e7
