1c7d08b9ac validation: Stricter assumeutxo error handling in InvalidateCoinsDBOnDisk (Ryan Ofsky)
9047337d36 validation: Stricter assumeutxo error handling in LoadChainstate (Ryan Ofsky)
Pull request description:
There are two places in assumeutxo code where it is calling `AbortNode` to trigger asynchronous shutdowns without returning errors to calling functions.
One case, in `LoadChainstate`, happens when snapshot validation succeeds, and there is an error trying to replace the background chainstate with the snapshot chainstate.
The other case, in `InvalidateCoinsDBOnDisk`, happens when snapshot validatiion fails, and there is an error trying to remove the snapshot chainstate.
In both cases the node is being forced to shut down, so it makes sense for these functions to raise errors so callers can know that an error happened without having to infer it from the shutdown state.
Noticed these cases while reviewing #27861, which replaces the `AbortNode` function with a `FatalError` function.
ACKs for top commit:
achow101:
ACK 1c7d08b9ac
TheCharlatan:
ACK 1c7d08b9ac
jamesob:
ACK 1c7d08b9ac ([`jamesob/ackr/27862.1.ryanofsky.validation_stricter_assu`](https://github.com/jamesob/bitcoin/tree/ackr/27862.1.ryanofsky.validation_stricter_assu))
Tree-SHA512: fb1dcde3fa0e77b4ba0c48507d289552b939c2866781579c8e994edc209abc3cd29cf81c89380057199323a8eec484956abb1fd3a43c957ecd0e7f7bbfd63fd8
28fff06afe test: Make linter to look for `BOOST_ASSERT` macros (Hennadii Stepanov)
47fe551e52 test: Kill `BOOST_ASSERT` (Hennadii Stepanov)
Pull request description:
One of the goals of https://github.com/bitcoin/bitcoin/pull/27783 was to get rid of the `BOOST_ASSERT` macros instead of including the `boost/assert.hpp` headers. See https://github.com/bitcoin/bitcoin/pull/27783#discussion_r1210612717.
It turns out that a couple of those macros sneaked into the codebase in https://github.com/bitcoin/bitcoin/pull/27790.
This PR makes the linter guard against new instances of the `BOOST_ASSERT` macros and replaces the current ones.
ACKs for top commit:
kevkevinpal:
ACK [28fff06](28fff06afe)
stickies-v:
ACK 28fff06af
TheCharlatan:
ACK 28fff06afe
Tree-SHA512: 371f613592cf677afe0196d18c83943c6c8f1e998f57b4ff3ee58bfeff8636e4dac1357840d8611b4f7b197def94df10fe1a8ca3282b00b7b4eff4624552dda8
e639364495 validation: add missing insert to m_dirty_blockindex (Martin Zumsande)
Pull request description:
When the status of a block index is changed, we must add it to `m_dirty_blockindex` or the change might not get persisted to disk.
This is missing from one spot in `FindMostWorkChain()`, where `BLOCK_FAILED_CHILD` is set.
Since we have [code](f0758d8a66/src/node/blockstorage.cpp (L284-L287)) that later sets missing `BLOCK_FAILED_CHILD` during the next startup, I don't think that this can lead to bad block indexes in practice, but I still think it's worth fixing.
ACKs for top commit:
TheCharlatan:
ACK e639364495
stickies-v:
ACK e639364495
Tree-SHA512: a97af9c173e31b90b677a1f95de822e08078d78013de5fa5fe4c3bec06f45d6e1823b7694cdacb887d031329e4b4afc6a2003916e0ae131279dee71f43e1f478
bdea2bb114 scripted-diff: Following the C++ Standard rules for identifiers with _. (Brotcrunsher)
Pull request description:
Any identifier starting with 2 _ is reserved for the compiler and thus must not be used.
See: https://stackoverflow.com/a/228797/7130273
ACKs for top commit:
MarcoFalke:
lgtm ACK bdea2bb114
Tree-SHA512: 74c8e676449f3f61476d846bfd2c514103c8914e13c4a0db841203abdc0267c25ddc6ed57d6791459efe3edea17753a1b53c3795071ddfe8aba8662521063407
fa76f0d0ef refactor: Make m_count_with_* in CTxMemPoolEntry int64_t, drop UBSAN supp (MarcoFalke)
Pull request description:
This is a refactor as long as no signed integer overflow appears. In normal operation and absent bugs, signed integer overflow should never happen in the touched code paths.
The main benefit of this refactor is to drop the file-wide ubsan suppression `unsigned-integer-overflow:txmempool.cpp`.
For now, this only changes the internal private representation and the publicly returned type remains `uint64_t`.
ACKs for top commit:
glozow:
ACK fa76f0d0ef
ryanofsky:
Code review ACK fa76f0d0ef
Tree-SHA512: a09e33a915d60c65d369d44ba1a45ce4a6a76e6dc2bea43216ba02b5eab0b74e214b2c7cc44360493f2c483d18d96e4636b7a75b23050976efc80e38de852c39
a1e653828b test: Add test for migrating default wallet and plain file wallet (Andrew Chow)
bdbe3fd76b wallet: Generated migrated wallet's path from walletdir and name (Andrew Chow)
Pull request description:
This PR fixes an assertion error that is hit during the setup of the new database during migration of a wallet that was not contained in a wallet dir. Also added a test for this case as well as one for migrating the default wallet.
ACKs for top commit:
ryanofsky:
Code review ACK a1e653828b
furszy:
ACK a1e65382
Tree-SHA512: 96b218c0de8567d8650ec96e1bf58b0f8ca4c4726f5efc6362453979b56b9d569baea0bb09befb3a5aed8d16d29bf75ed5cd8ffc432bbd4cbcad3ac5574bc479
daa5a658c0 refactor: rename BCLog::BLOCKSTORE to BLOCKSTORAGE (Jon Atack)
cf622b214b doc: release note re raising on invalid -debug/debugexclude/loglevel (Jon Atack)
6cb1c66041 init: remove config option names from translated -loglevel strings (Jon Atack)
2547829272 test: -loglevel raises on invalid values (Jon Atack)
a9c295888b init: raise on invalid loglevel config option (Jon Atack)
b0c3995393 test: -debug and -debugexclude raise on invalid values (Jon Atack)
4c3c19d943 init: raise on invalid debug/debugexclude config options (Jon Atack)
Pull request description:
and rename BCLog::BLOCKSTORE to BLOCKSTORAGE so the enum is the same as its value like the other BCLog enums.
Per discussion in bitcoin-core-dev IRC today from https://bitcoin-irc.chaincode.com/bitcoin-core-dev/2023-05-11#921458.
ACKs for top commit:
achow101:
ACK daa5a658c0
ryanofsky:
Code review ACK daa5a658c0. Just translated string template cleanup since last review
pinheadmz:
re-ACK daa5a658c0
Tree-SHA512: 4c107a93d8e8ce4e2ee81d44aec672526ca354ec390b241221067f68204beac8b4ba7a65748bcfa124ff2245c4307fa9243ec4fe0b464d0fa69c787fb322c3cc
a72af2e833 bench: disable birth time block skip for wallet_create_tx.cpp (furszy)
Pull request description:
As the benchmarks inside `wallet_create_tx.cpp` assert the wallet
balance at the end, they require all blocks to be scanned by the wallet.
So, we need to ensure that no blocks are skipped by the recently added
wallet birth time functionality.
This just means setting the wallet birth time to the genesis block time.
So the wallet is always older than any new block.
ACKs for top commit:
achow101:
ACK a72af2e833
hernanmarino:
ACK a72af2e833
TheCharlatan:
ACK a72af2e833
Tree-SHA512: d3148659bd633d20978736e1292e3456a2c6dd2b6c8f60625a4160e16818d923487c889237eb3f34693f7dd78b7d124b89afdc56e4c9fad370026d0733ef1e08
faa05d1965 fuzz: Fix implicit-integer-sign-change in wallet/fees fuzz target (MarcoFalke)
Pull request description:
This fixes a bug in the fuzz target.
```
echo 'OiAAAPr//wAAAAAAAAA=' | base64 --decode > /tmp/a
UBSAN_OPTIONS="suppressions=$(pwd)/test/sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1:report_error_type=1" FUZZ=wallet_fees ./src/test/fuzz/fuzz /tmp/a
```
```
wallet/fees.cpp:58:58: runtime error: implicit conversion from type 'unsigned int' of value 4294574080 (32-bit, unsigned) to type 'int' changed the value to -393216 (32-bit, signed)
#0 0x5625ef46a094 in wallet::GetMinimumFeeRate(wallet::CWallet const&, wallet::CCoinControl const&, FeeCalculation*) src/wallet/fees.cpp:58:58
#1 0x5625eedd467f in wallet::(anonymous namespace)::wallet_fees_fuzz_target(Span<unsigned char const>) src/wallet/test/fuzz/fees.cpp:64:11
...
SUMMARY: UndefinedBehaviorSanitizer: implicit-integer-sign-change wallet/fees.cpp:58:58 in
ACKs for top commit:
dergoegge:
tACK faa05d1965
brunoerg:
ACK faa05d1965
Tree-SHA512: 66a4020d6a4153a92c7023e9f94ec6279862566db7236ce3cf6951b7fbee616dc88a56fe9502de4099d74f9840439b20a984b0733fb432e43129e774bcc2a6e6
d2b39e09bc test: ensure old fee_estimate.dat not read on restart and flushed (ismaelsadeeq)
cf219f29f3 tx fees, policy: read stale fee estimates with a regtest-only option (ismaelsadeeq)
3eb241a141 tx fees, policy: do not read estimates of old fee_estimates.dat (ismaelsadeeq)
5b886f2b43 tx fees, policy: periodically flush fee estimates to fee_estimates.dat (ismaelsadeeq)
Pull request description:
Fixes#27555
The issue arises when an old `fee_estimates.dat` file is sometimes read during initialization.
Or after an unclean shutdown, the latest fee estimates are not flushed to `fee_estimates.dat`.
If the fee estimates in the old file are old, they can cause transactions to become stuck in the mempool.
This PR ensures that nodes do not use stale estimates from the old file during initialization. If `fee_estimates.dat`
has not been updated for 60 hours or more, it is considered stale and will not be read during initialization. To avoid
having old estimates, the `fee_estimates.dat` file will be flushed periodically every hour. As mentioned #27555
> "The immediate improvement would be to store fee estimates to disk once an hour or so to reduce the chance of having an old file. From there, this case could probably be detected, and refuse to serve estimates until we sync."
In addition, I will follow-up PR to persist the `mempoolminfee` across restarts.
ACKs for top commit:
willcl-ark:
ACK d2b39e09bc
instagibbs:
reACK d2b39e09bc
glozow:
ACK d2b39e09bc. One nit if you follow up.
Tree-SHA512: 4f6e0c296995d0eea5cf80c6aefdd79b7295a6a0ba446f2166f32afc105fe4f831cfda1ad3abd13c5c752b4fbea982cf4b97eaeda2af1fd7184670d41edcfeec
Any identifier starting with two _, or one _ followed by a capital letter is reserved for the compiler and thus must not be used. See: https://stackoverflow.com/a/228797/7130273
-BEGIN VERIFY SCRIPT-
s() { git grep -l "$1" src | xargs sed -i "s/$1/$2/g"; }
s '__pushKV' 'pushKVEnd'
s '_EraseTx' 'EraseTxNoLock'
s '_Other' 'Other'
-END VERIFY SCRIPT-
40b333e21f fuzz: wallet, add target for CoinControl (Ayush Singh)
Pull request description:
This PR adds fuzz coverage for `wallet/coincontrol`.
Motivation: Issue [#27272](https://github.com/bitcoin/bitcoin/issues/27272#issue-1628327906)
The idea is to create different/unique instances of `COutPoint` by placing it inside the `CallOneOf` function, which may or may not be consumed by all of the `CoinControl` file's methods.
This is my first PR on Bitcoin Core, and I will try my best to address any reviews/changes ASAP. I'm also working on fuzz harness files for other files in the wallet and plan to open PR for them soon.
ACKs for top commit:
kevkevinpal:
reACK [40b333e](40b333e21f)
MarcoFalke:
lgtm ACK 40b333e21f
achow101:
ACK 40b333e21f
brunoerg:
crACK 40b333e21f
dergoegge:
ACK 40b333e21f
Tree-SHA512: 174769f4e86df8590b532b85480fd620082587e84e50e49ca9b52f0588a219355362cefd66250dd9942e86019d27af4ca599b45e871e9f147d2cc0ba97c4aa7b
As the benchmarks inside wallet_create_tx.cpp assert the
wallet balance at the end, they require all
blocks to be scanned by the wallet. So, we need
to ensure that no blocks are skipped by the recently
added wallet birth time functionality.
This just means setting the wallet birthtime to the
genesis block time. So the wallet is always older than
any new block.
5524fa00fa doc: add release note about removal of `deprecatedrpc=walletwarningfield` flag (Sebastian Falbesoner)
5c77db7354 Restorewallet/createwallet help documentation fixups/improvements (Jon Atack)
a00ae31fcc rpc: remove deprecated "warning" field from {create,load,restore,unload}wallet (Sebastian Falbesoner)
Pull request description:
The "warning" string field for wallet creating/loading RPCs (`createwallet`, `loadwallet`, `unloadwallet` and `restorewallet`) has been deprecated with the configuration option `-deprecatedrpc=walletwarningfield` in PR #27279 (released in v25.0). For the next release v26.0, the field and the configuration option can be removed.
ACKs for top commit:
achow101:
ACK 5524fa00fa
jonatack:
ACK 5524fa00fa
Tree-SHA512: 8212f72067d08095304018b8a95d2ebef630004b65123483fbbfb078cc5709c2d825bbc35b16ea5f6b28ae7377347382d7e9afaf7bdbf0575d2c229d970784de
Currently InvalidateCoinsDBOnDisk is calling AbortNode without an error to the
caller if it fails. Change it to return just return util::Result, and update
the caller to handle the error itself.
This causes the secondary error to be shown below the main error instead of the
other way around.
Make LoadChainstate return an explicit error when snapshot validation succeeds,
but there is an error trying to replace the background chainstate with the
snapshot chainstate. Previously in this case LoadChainstate would trigger a
shutdown and return INTERRUPTED, now it will return an actual error code.
There's no real change to behavior other than error message being formatted a
little differently.
Motivation for this change is to replace error handling via callbacks with
error handling via return value ahead of
https://github.com/bitcoin/bitcoin/pull/27861
fa8ef7d138 refactor: Avoid copy of bilingual_str when formatting, Fix ADL violation (MarcoFalke)
Pull request description:
This refactor shouldn't change behavior, but may fix compile errors such as https://github.com/bitcoin/bitcoin/pull/27862#issuecomment-1592516184
ACKs for top commit:
achow101:
ACK fa8ef7d138
ryanofsky:
Code review ACK fa8ef7d138. Looks great! Thanks for updating
hebasto:
ACK fa8ef7d138, I have reviewed the code and it looks OK.
Tree-SHA512: 903019962f27b5432b8e3af052b472238ef68d3ee165148c9d2232bf290309075f9f17d8d06c9b5c7fddb89c1a9c3a4c09c6310af01e8561adc0244a30db0857
The return type of TranslateArg is std::string, which creates a copy.
Fix this by moving everything into a lambda that takes a reference and
returns a reference.
Also, the format function is called without specifying the namespace it
lives in. Fix this by specifying the namespace. See also:
7a59865793/doc/developer-notes.md (L117-L137).
If -acceptstalefeeestimates option is passed stale fee estimates can now
be read when operating in regtest environments.
Additionally, this commit updates all declarations of the CBlockPolicyEstimator
class to include a the second constructor variable.
This is a refactor as long as no signed integer overflow appears. In
normal operation and absent bugs, signed integer overflow should never
happen in the touched code paths.
The main benefit of this refactor is to drop the file-wide ubsan
suppression unsigned-integer-overflow:txmempool.cpp.
For now, this only changes the internal private representation and the
publicly returned type remains uint64_t.
cdba23db35 wallet: Document blank flag use in descriptor wallets (Ryan Ofsky)
43310200dc wallet: Ensure that the blank wallet flag is unset after imports (Andrew Chow)
e9379f1ffa rpc, wallet: Include information about blank flag (Andrew Chow)
Pull request description:
The `blank` wallet flag is used to indicate that the wallet intentionally does not have any keys, scripts, or descriptors, and it prevents the automatic generation of those things for such a wallet. Once the wallet contains any of those data, it is unnecessary, and possibly incorrect, to have `blank` set. This PR fixes a few places where this was not properly happening. It also adds a test for this unset behavior.
ACKs for top commit:
S3RK:
reACK cdba23db35
ryanofsky:
Code review ACK cdba23db35. Only change since last review is dropping the commit which makes createwallet RPC set BLANK flag automatically when DISABLE_PRIVATE_KEYS flag is set
Tree-SHA512: 85bc2a9754df0531575d5c8f4ad7e8f38dcd50083dc29b3283dacf56feae842e81f34654c5e1781f2dadb0560ff80e454bbc8ca3b2d1fab1b236499ae9abd7da
d54819d74e scripted-diff: Use datadir from options in chainstatemanager test (TheCharlatan)
Pull request description:
This should make the test less reliant on argument state from the test setup. This is a follow-up PR as requested in https://github.com/bitcoin/bitcoin/pull/27576#discussion_r1224638890.
ACKs for top commit:
achow101:
ACK d54819d74e
MarcoFalke:
lgtm ACK d54819d74e
kevkevinpal:
ACK d54819d74e
ryanofsky:
Code review ACK d54819d74e
Tree-SHA512: 939fde2505c5585d993545a3d05d3a00caec40f860c74fa002caebdf4c1b70e774cfb028a8a8f780525f8968844157d2c568d9f2c8dd5ec32b093173d8644c34
76c5ea703e fuzz: Fix mini_miner_selection running out of coin (Murch)
Pull request description:
Fixes a bug in the mini_miner_selection fuzz test found by fuzzing: It was possible for the mini_miner_selection fuzz test to generated transactions that created fewer new outputs than the two inputs they each spent. If the fuzz seed did so consistently, eventually it would cause a `pop_front()` on an empty available_coins which resulted in undefined behavior.
Fixed per belt-suspender approach:
- assert that available_coins is not empty before generating tx
- generate at least two coins per new tx
- allow building tx with a single input if only one coin is available
ACKs for top commit:
MarcoFalke:
lgtm ACK 76c5ea703e
dergoegge:
reACK 76c5ea703e
Tree-SHA512: 5b7ffd1905a712733ad5364958ad79874dd8c31bd50069b0d3e6f734da0f2d496cb08cbe0afa47115674313e1cb7166a6087f2ccbce289774caddc790583e241
3ef756a5b5 Remove txmempool implicit-integer-sign-change sanitizer suppressions (Hennadii Stepanov)
d2f6d2a95a Use `int32_t` type for most transaction size/weight values (Hennadii Stepanov)
Pull request description:
From bitcoin/bitcoin#23957 which has been incorporated into this PR:
> A file-wide suppression is problematic because it will wave through future violations, potentially bugs.
>
> Fix that by using per-statement casts.
>
> This refactor doesn't change behavior because the now explicit casts were previously done implicitly.
>
> Similar to commit 8b5a4de904
ACKs for top commit:
achow101:
ACK 3ef756a5b5
0xB10C:
ACK 3ef756a5b5. I've focused my testing and code review on the tracepoint related changes. The docs, the test, and the mempool_monitor.py demo script are updated. I ran the `interface_usdt_mempool.py` test and the `mempool_monitor.py` script. The `mempool_monitor.py` output looks correct.
Xekyo:
codereview ACK 3ef756a5b5
ryanofsky:
Code review ACK 3ef756a5b5. Since last review, just rebased with more type changes in test and tracing code
Tree-SHA512: 397407f72165b6fb85ff1794eb1447836c4f903efed1a05d7a9704c88aa9b86f330063964370bbd59f6b5e322e04e7ea8e467805d58dce381e68f7596433330f
This should make the test less reliant on details of the test setup
-BEGIN VERIFY SCRIPT-
sed -i 's/m_args.GetDataDirNet()/chainman.m_options.datadir/g' src/test/validation_chainstatemanager_tests.cpp
-END VERIFY SCRIPT-
7d452d826a test: add coverage for `/deploymentinfo` passing a blockhash (brunoerg)
ce887eaf49 rest: bugfix, fix crash error when calling `/deploymentinfo` (brunoerg)
Pull request description:
Calling `/deploymentinfo` passing a valid blockhash makes bitcoind to crash. It happens because we're pushing a JSON value of type array when it expects type object. See:
```cpp
jsonRequest.params = UniValue(UniValue::VARR);
```
```cpp
jsonRequest.params.pushKV("blockhash", hash_str);
```
This PR fixes it by changing `pushKV` to `push_back` and adds more test coverage.
ACKs for top commit:
achow101:
ACK 7d452d826a
stickies-v:
ACK 7d452d826a
Tree-SHA512: f01551e556aba2380c3eaed0bc59057304302c202d317d7c1eec5f7ef839851f672aed80819a8719cb1cbbad2aad735d6d44314ac7d6d98bff8217f5a16c312b
Fixes a bug in the mini_miner_selection fuzz test found by fuzzing:
It was possible for the mini_miner_selection fuzz test to generated
transactions that created fewer new spendable outputs than the two
inputs they each spend. If the fuzz seed did so consistently, eventually
it would cause a `pop_front()` on an empty available_coins.
Fixed by:
- asserting that available_coins is not empty before generating tx
- allowing to build tx with a single coin if only one is available
61c569ab60 refactor: decouple early return commands from AppInit (furszy)
4927167f85 gui: return EXIT_FAILURE on post-init fatal errors (furszy)
3b2c61e819 Return EXIT_FAILURE on post-init fatal errors (furszy)
3c06926cf2 refactor: index: use `AbortNode` in fatal error helper (Sebastian Falbesoner)
9ddf7e03a3 move ThreadImport ABC error to use AbortNode (furszy)
Pull request description:
It seems odd to return `EXIT_SUCCESS` when the node aborted execution due a fatal internal error
or any post-init problem that triggers an unrequested shutdown.
e.g. blocks or coins db I/O errors, disconnect block failure, failure during thread import (external
blocks loading process error), among others.
ACKs for top commit:
TheCharlatan:
ACK 61c569ab60
ryanofsky:
Code review ACK 61c569ab60
pinheadmz:
ACK 61c569ab60
theStack:
Code-review ACK 61c569ab60
Tree-SHA512: 18a59c3acc1c6d12cbc74a20a401e89659740c6477fccb59070c9f97922dfe588468e9e5eef56c5f395762187c34179a5e3954aa5b844787fa13da2e666c63d3
faa2976a56 Remove mapRelay (MarcoFalke)
fccecd75fe net_processing: relay txs from m_most_recent_block (Anthony Towns)
Pull request description:
`mapRelay` (used to relay announced transactions that are no longer in the mempool) has issues:
* It doesn't have an absolute memory limit, only an implicit one based on the rate of transaction announcements
* <strike>It doesn't have a use-case</strike> EDIT: see below
Fix all issues by removing `mapRelay`.
For more context, on why a transaction may have been removed from the mempool, see c2f2abd0a4/src/txmempool.h (L228-L238)
For my rationale on why it is fine to not relay them:
Reason | | Rationale
-- | -- | --
`EXPIRY` | Expired from mempool | Mempool expiry is by default 2 weeks and can not be less than 1 hour, so a transaction can not be in `mapRelay` while expiring, unless a re-broadcast happened. This should be fine, because the transaction will be re-added to the mempool and potentially announced/relayed on the next re-broadcast.
`SIZELIMIT` | Removed in size limiting | A low fee transaction, which will be relayed by a different peer after `GETDATA_TX_INTERVAL` or after we sent a `notfound` message. Assuming it ever made it to another peer, otherwise it will happen on re-broadcast (same as with `EXPIRY` above).
`REORG` | Removed for reorganization | Block races are rare, so reorgs should be rarer. Also, the transaction is likely to be re-accepted via the `disconnectpool` later on. If not, it seems fine to let the originating wallet deal with rebroadcast in this case.
`BLOCK` | Removed for block | EDIT: Needed for compact block relay, see https://github.com/bitcoin/bitcoin/pull/27625#issuecomment-1544047433
`CONFLICT` | Removed for conflict with in-block transaction | The peer won't be able to add the tx to the mempool anyway, unless it is on a different block, in which case it seems fine to let the originating wallet take care of the rebroadcast (if needed).
`REPLACED` | Removed for replacement | EDIT: Also needed for compact block relay, see https://github.com/bitcoin/bitcoin/pull/27625#issuecomment-1544171255 ?
ACKs for top commit:
sdaftuar:
ACK faa2976a56
ajtowns:
ACK faa2976a56
glozow:
code review ACK faa2976a56
Tree-SHA512: 64ae3e387b001bf6bd5b6c938e7317f4361f9bc0b8cc5d8f63a16cda2408d2f634a22f8157dfcd8957502ef358208292ec91e7d70c9c2d8a8c47cc0114ecfebd
