Commit graph

80 commits

Author SHA1 Message Date
John Newbery
2c64270bbe [refactor] Don't call AcceptToMemoryPool() from outside validation.cpp 2021-11-03 14:34:41 +00:00
John Newbery
497c9e2964 [test] Don't set bypass_limits to true in txvalidationcache_tests.cpp
AcceptToMemoryPool() is called for transactions with fees above
minRelayTxFee and with the mempool not full, so setting bypass_limits to
true or false has no impact on the test.

The only way that changing bypass_limits from true to false could change
the result would be to change the outcome to INVALID(TX_MEMPOOL_POLICY).
Since all the ATMP calls in this test result in VALID both before and
after this change, there is no change in behavior.
2021-11-03 12:04:46 +00:00
MarcoFalke
fa4db8671b
test: Activate all regtest softforks at height 1, unless overridden 2021-09-16 18:53:04 +02:00
MarcoFalke
fd557ceb88
Merge bitcoin/bitcoin#13533: [tests] Reduced number of validations in tx_validationcache_tests
c3e111a7da Reduced number of validations in `tx_validationcache_tests` to keep the run time reasonable. (lucash-dev)

Pull request description:

  Following a suggestion in the comments, changed `ValidateCheckInputsForAllFlags` from testing all possible flag combinations to testing a random subset. Also created a new enum constant for the highest flag, so that this test doesn’t keep testing an incomplete subset in case a new flag is added.

  Timing for `checkinputs_test`:
  ```
  Before:   6.8s
  After:    3.7s
  ----------------
  Saved:    3.1s (45%)
  ```

  This PR was split from #13050. Also see #10026.

ACKs for top commit:
  leonardojobim:
    tACK c3e111a7da.
  kallewoof:
    ACK c3e111a7da
  theStack:
    re-ACK c3e111a7da

Tree-SHA512: bef49645bdd4f61ec73cc77a9f028b95d9856db9446d2e7fc9a48867a6f0e94c2c9f150cb771a30fe852db0efb0a1bd15d38b00d712651793ccb59ff6157a7b4
2021-07-24 10:36:58 +02:00
Carl Dong
0d61634c06 scripted-diff: test: Use existing chainman in unit tests
-BEGIN VERIFY SCRIPT-
git ls-files -- src/test \
    | grep -v '^src/test/fuzz' \
    | xargs sed -i -E \
            -e 's@g_chainman\.m_blockman@m_node.chainman->m_blockman@g' \
            -e 's@([^:])(Chain(state|)Active)@\1::\2@g' \
            -e 's@::Chain(state|)Active\(\)@m_node.chainman->ActiveChain\1()@g'
-END VERIFY SCRIPT-
2021-06-10 15:04:39 -04:00
Carl Dong
e197076219 test: Pass in CoinsTip to ValidateCheckInputsForAllFlags 2021-06-10 15:04:39 -04:00
MarcoFalke
34d7030063
Merge #21202: [validation] Two small clang lock annotation improvements
25c57d6409 [doc] Add a note about where lock annotations should go. (Amiti Uttarwar)
ad5f01b960 [validation] Move the lock annotation from function definition to declaration (Amiti Uttarwar)

Pull request description:

  Based on reviewing #21188

  the first commit switches the lock annotations on `CheckInputScripts` to be on the function declaration instead of on the function definition. this ensures that all call sites are checked, not just ones that come after the definition.

  the second commit adds a note to the developer-notes section to clarify where the annotations should be applied.

ACKs for top commit:
  MarcoFalke:
    ACK 25c57d6409 🥘
  promag:
    Code review ACK 25c57d6409.

Tree-SHA512: 61b6ef856bf6c6016d535fbdd19daf57b9e59fe54a1f30d47282a071b9b9d60b2466b044ee57929e0320cb1bdef52e7a1687cacaa27031bbc43d058ffffe22ba
2021-02-22 09:47:15 +01:00
Carl Dong
3704433c4f scripted-diff: Invoke ::AcceptToMemoryPool with chainstate
-BEGIN VERIFY SCRIPT-
find_regex='\bAcceptToMemoryPool\(' \
    && git grep -l -E "$find_regex" -- src \
        | grep -v '^src/validation\.\(cpp\|h\)$' \
        | xargs sed -i -E 's@'"$find_regex"'@\0::ChainstateActive(), @g'
-END VERIFY SCRIPT-
2021-02-18 14:49:06 -05:00
Amiti Uttarwar
25c57d6409 [doc] Add a note about where lock annotations should go. 2021-02-17 15:58:23 -08:00
Amiti Uttarwar
ad5f01b960 [validation] Move the lock annotation from function definition to declaration
When the annotation is on the definition, it does not check call sites between
the declaration and the definition.
2021-02-17 15:45:11 -08:00
gzhao408
f82baf0762 [refactor] return MempoolAcceptResult
This creates a cleaner interface with ATMP, allows us to make results const,
and makes accessing values that don't make sense (e.g. fee when tx is
invalid) an error.
2021-02-09 07:01:52 -08:00
lucash-dev
c3e111a7da Reduced number of validations in tx_validationcache_tests to keep the run time reasonable.
Following a suggestion in the comments, changed `ValidateCheckInputsForAllFlags` from testing all possible flag combinations to testing a random subset. Also created a new enum constant for the highest flag, so that this test doesn’t keep testing an incomplete subset in case a new flag is added.
2020-10-15 13:45:30 -07:00
John Newbery
b048b275d9 [validation] Remove absurdfee from accepttomempool
Mempool behavior should not be user-specific.
Checking that txfee is acceptable should be
the responsibility of the wallet or client, not
the mempool.
2020-10-05 04:55:01 -07:00
MeshCollider
b887060d06 Replace usage of GetScriptForWitness with GetScriptForDestination 2020-08-14 08:44:42 +12:00
MarcoFalke
a998c5185b
Merge #18675: tests: Don't initialize PrecomputedTransactionData in txvalidationcache tests
3718ae2ef8 [tests] Don't initialize PrecomputedTransactionData in txvalidationcache tests (John Newbery)

Pull request description:

  PrecomputedTransactionData is initialized inside CheckInputScripts(). No need to pre-initialize it before calling into CheckInputScripts().

  Normally, I wouldn't bother, but we're making changes to `PrecomputedTransactionData` in #17977 which would break these tests without removing these constructions. Might as well get these changes out of the way here.

ACKs for top commit:
  robot-visions:
    ACK 3718ae2ef8
  sipa:
    utACK 3718ae2ef8

Tree-SHA512: bc9c095035a7072a2a91941df38cdbb969e817264efbaa6dcb88cc3ab132d9264aa0751fa588d1a5e45f37b4d2bb1903cda078765f0bbcc87d9cc47cbec5356a
2020-04-19 06:18:21 -04:00
John Newbery
3718ae2ef8 [tests] Don't initialize PrecomputedTransactionData in txvalidationcache tests
PrecomputedTransactionData is initialized inside CheckInputScripts(). No need
to pre-initialize it before calling into CheckInputScripts().
2020-04-16 15:20:57 -04:00
MarcoFalke
fac5c37300
scripted-diff: Sort test includes
-BEGIN VERIFY SCRIPT-
 # Mark all lines with #includes
 sed -i --regexp-extended -e 's/(#include <.*>)/\1 /g' $(git grep -l '#include' ./src/bench/ ./src/test ./src/wallet/test/)
 # Sort all marked lines
 git diff -U0 | ./contrib/devtools/clang-format-diff.py -p1 -i -v
-END VERIFY SCRIPT-
2020-04-16 13:32:36 -04:00
Sebastian Falbesoner
b3c4d9bac6 test: rename test suite name "tx_validationcache_tests" to match filename
Quoting src/test/README.md, 'Adding test cases':
    "The file naming convention is `<source_filename>_tests.cpp`
     and such files should wrap their tests in a test suite
     called `<source_filename>_tests`."

Currently the unit test source file txvalidationcache_tests.cpp contains a unit
test suite with the name tx_validationcache_tests, which is fixed by this commit.
The following shell script shows that this is the only mismatch and for all other
unit test source files the test suite names are correct:

 #!/bin/bash
 shopt -s globstar
 for test_full_filename in **/*_tests.cpp; do
     test_name_file=`basename $test_full_filename .cpp`
     test_name_suite=`sed -n "s/^.*TEST_SUITE(\(.*_tests\).*$/\1/p" $test_full_filename`
     if [ $test_name_file != $test_name_suite ]; then
         echo "TestFilename: $test_name_file != TestSuitname: $test_name_suite"
     fi
 done
2020-01-27 22:44:02 +01:00
MarcoFalke
e09c701e01 scripted-diff: Bump copyright of files changed in 2020
-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
2020-01-15 02:18:00 +07:00
MarcoFalke
3f8dbcd655
Merge #16658: validation: Rename CheckInputs to CheckInputScripts
3bd8db80d8 [validation] fix comments in CheckInputScripts() (John Newbery)
6f6465cefc scripted-diff: [validation] Rename CheckInputs to CheckInputScripts (John Newbery)

Pull request description:

  CheckInputs() used to check no double spends, scripts & sigs and amounts. Since
  832e074, the double spend and amount checks
  have been moved to CheckTxInputs(), and CheckInputs() now just validates
  input scripts. Rename the function to CheckInputScripts().

  Also fix incorrect comments.

ACKs for top commit:
  MarcoFalke:
    re-ACK 3bd8db80d8, did the rebase myself, checked the scripted diff 👡
  promag:
    ACK 3bd8db80d8 :trollface:

Tree-SHA512: 7b3f8597d210492798fb784ee8ea47ea6377519111190161c7cc34a967509013f4337304f52e9bedc97b7710de7b0ff8880e08cd7f867754567f82e7b02c794c
2020-01-02 11:09:00 -05:00
MarcoFalke
fa538813b1
scripted-diff: Replace ::mempool with m_node.mempool in tests
-BEGIN VERIFY SCRIPT-
 # tx pool member access (mempool followed by dot)
 sed --regexp-extended -i -e 's/(::)?\<mempool\>\.([a-zA-Z])/m_node.mempool->\2/g' $(git grep -l mempool ./src/test)
 # plain global (mempool not preceeded by dot, but followed by comma)
 sed --regexp-extended -i -e 's/([^\.])(::)?\<mempool\>,/\1*m_node.mempool,/g'     $(git grep -l mempool ./src/test)
-END VERIFY SCRIPT-
2019-11-15 13:40:14 -05:00
MarcoFalke
8888ad02e2
test: Replace recursive lock with locking annotations
Also, use m_node.mempool instead of the global
2019-11-15 13:40:08 -05:00
John Newbery
6f6465cefc scripted-diff: [validation] Rename CheckInputs to CheckInputScripts
CheckInputs() used to check no double spends, scripts & sigs and amounts. Since
832e0744cb, the double spend and amount checks
have been moved to CheckTxInputs(), and CheckInputs() now just validates
input scripts. Rename the function to CheckInputScripts().

-BEGIN VERIFY SCRIPT-
sed -i -E -e 's/CheckInputs\b/CheckInputScripts/g' $(git grep -l CheckInputs | grep -v doc/)
-END VERIFY SCRIPT-
2019-11-07 13:50:58 -05:00
MarcoFalke
faec28252c
scripted-diff: test: Move setup_common to test library
-BEGIN VERIFY SCRIPT-
 # Move files
 for f in $(git ls-files src/test/lib/); do git mv $f src/test/util/; done
 git mv src/test/setup_common.cpp                     src/test/util/
 git mv src/test/setup_common.h                       src/test/util/
 # Replace Windows paths
 sed -i -e 's|\\setup_common|\\util\\setup_common|g' $(git grep -l '\\setup_common')
 sed -i -e 's|src\\test\\lib\\|src\\test\\util\\|g'  build_msvc/test_bitcoin/test_bitcoin.vcxproj
 # Everything else
 sed -i -e 's|/setup_common|/util/setup_common|g'    $(git grep -l 'setup_common')
 sed -i -e 's|test/lib/|test/util/|g'                $(git grep -l 'test/lib/')
 # Fix include guard
 sed -i -e 's|BITCOIN_TEST_SETUP_COMMON_H|BITCOIN_TEST_UTIL_SETUP_COMMON_H|g' ./src/test/util/setup_common.h
 sed -i -e 's|BITCOIN_TEST_LIB_|BITCOIN_TEST_UTIL_|g'                     $(git grep -l 'BITCOIN_TEST_LIB_')
-END VERIFY SCRIPT-
2019-11-06 11:56:41 -05:00
John Newbery
3004d5a12d [validation] Remove fMissingInputs from AcceptToMemoryPool()
Handle this failure in the same way as all other failures: call Invalid()
with the reasons for the failure.
2019-10-29 15:46:45 -04:00
John Newbery
a27a2957ed [validation] Add CValidationState subclasses
Split CValidationState into TxValidationState and BlockValidationState
to store validation results for transactions and blocks respectively.
2019-10-29 15:46:45 -04:00
Matt Corallo
9b92538ade
Remove unused fScriptChecks parameter from CheckInputs
fScriptChecks = false just short-circuits the entire function, so
passing it in is entirely useless.
2019-08-26 16:27:58 -07:00
James O'Beirne
fae6ab6aed refactor: pcoinsTip -> CChainState::CoinsTip()
This aliasing makes subsequent commits easier to review; eventually CoinsTip()
will return the CCoinsViewCache managed by CChainState.
2019-08-06 13:13:06 -04:00
Andrew Chow
37a79a4fcc Move various SigningProviders to signingprovider.{cpp,h}
Moves all of the various SigningProviders out of sign.{cpp,h} and
keystore.{cpp,h}. As such, keystore.{cpp,h} is also removed.

Includes and the Makefile are updated to reflect this. Includes were largely
changed using:
git grep -l "keystore.h" | xargs sed -i -e 's;keystore.h;script/signingprovider.h;g'
2019-07-09 16:20:18 -04:00
Andrew Chow
d9becff4e1 scripted-diff: rename CBasicKeyStore to FillableSigningProvider
-BEGIN VERIFY SCRIPT-
git grep -l "CBasicKeyStore" | xargs sed -i -e 's/CBasicKeyStore/FillableSigningProvider/g'
-END VERIFY SCRIPT-
2019-07-09 16:20:18 -04:00
practicalswift
9a841696c1 tests: Reduce compilation time and unneccessary recompiles by removing unused includes in tests 2019-06-26 20:37:48 +02:00
practicalswift
eca9767673 Make reasoning about dependencies easier by not including unused dependencies 2019-06-02 17:15:23 +02:00
MarcoFalke
fa3c651143
[refactor] interfaces: Add missing LockAnnotation for cs_main 2019-05-13 14:46:01 -04:00
Wladimir J. van der Laan
de5af41e35
Merge #15452: Replace CScriptID and CKeyID in CTxDestination with dedicated types
78e407ad0c GetKeyBirthTimes should return key ids, not destinations (Gregory Sanders)
70946e7fee Replace CScriptID and CKeyID in CTxDestination with dedicated types (Gregory Sanders)

Pull request description:

  The current usage seems to be an overloading of meanings. `CScriptID` is used in the wallet as a lookup key, as well as a destination, and `CKeyID` likewise. Instead, have all destinations be dedicated types.

  New types:
  `CScriptID`->`ScriptHash`
  `CKeyID`->`PKHash`

ACKs for commit 78e407:
  ryanofsky:
    utACK 78e407ad0c. Only changes are removing extra CScriptID()s and fixing the test case.
  Sjors:
    utACK 78e407a
  meshcollider:
    utACK 78e407ad0c

Tree-SHA512: 437f59fc3afb83a40540da3351507aef5aed44e3a7f15b01ddad6226854edeee762ff0b0ef336fe3654c4cd99a205cef175211de8b639abe1130c8a6313337b9
2019-05-09 18:54:43 +02:00
James O'Beirne
631940aab2 scripted-diff: replace chainActive -> ::ChainActive()
Though at the moment ChainActive() simply references `g_chainstate.m_chain`,
doing this change now clears the way for multiple chainstate usage and allows
us to script the diff.

-BEGIN VERIFY SCRIPT-
git grep -l "chainActive" | grep -E '(h|cpp)$' | xargs sed -i '/chainActive =/b; /extern CChain& chainActive/b; s/\(::\)\{0,1\}chainActive/::ChainActive()/g'
-END VERIFY SCRIPT-
2019-05-03 15:02:54 -04:00
Gregory Sanders
70946e7fee Replace CScriptID and CKeyID in CTxDestination with dedicated types 2019-04-29 10:15:23 -04:00
MarcoFalke
faf400077d
scripted-diff: Bump copyright headers in test, bench
-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./src/bench/
./contrib/devtools/copyright_header.py update ./src/test/
-END VERIFY SCRIPT-
2019-04-11 13:34:43 -04:00
MarcoFalke
fa821904bf
scripted-diff: Rename test_bitcoin to test/setup_common
-BEGIN VERIFY SCRIPT-
sed -i --regexp-extended -e 's/test_bitcoin\.(h|cpp)/setup_common.\1/g' $(git grep -l test_bitcoin)
git mv ./src/test/test_bitcoin.h   ./src/test/setup_common.h
git mv ./src/test/test_bitcoin.cpp ./src/test/setup_common.cpp
sed -i -e 's/BITCOIN_TEST_TEST_BITCOIN_H/BITCOIN_TEST_SETUP_COMMON_H/g' ./src/test/setup_common.h
-END VERIFY SCRIPT-
2019-04-11 10:12:36 -04:00
practicalswift
543ef7d626 tests: Add missing cs_main locks required when accessing pcoinsdbview, pcoinsTip or pblocktree 2019-02-15 10:41:52 +01:00
practicalswift
c84c2b8c92 tests: Test for expected return values when calling functions returning a success code 2018-12-13 09:37:23 +01:00
lucash-dev
ed61abedb2 Removed implicit CTransaction constructor from tests 2018-12-11 19:43:35 -08:00
Jim Posen
2068f089c8 scripted-diff: Move util files to separate directory.
-BEGIN VERIFY SCRIPT-
mkdir -p src/util
git mv src/util.h src/util/system.h
git mv src/util.cpp src/util/system.cpp
git mv src/utilmemory.h src/util/memory.h
git mv src/utilmoneystr.h src/util/moneystr.h
git mv src/utilmoneystr.cpp src/util/moneystr.cpp
git mv src/utilstrencodings.h src/util/strencodings.h
git mv src/utilstrencodings.cpp src/util/strencodings.cpp
git mv src/utiltime.h src/util/time.h
git mv src/utiltime.cpp src/util/time.cpp

sed -i 's/<util\.h>/<util\/system\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utilmemory\.h>/<util\/memory\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utilmoneystr\.h>/<util\/moneystr\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utilstrencodings\.h>/<util\/strencodings\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utiltime\.h>/<util\/time\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')

sed -i 's/BITCOIN_UTIL_H/BITCOIN_UTIL_SYSTEM_H/g' src/util/system.h
sed -i 's/BITCOIN_UTILMEMORY_H/BITCOIN_UTIL_MEMORY_H/g' src/util/memory.h
sed -i 's/BITCOIN_UTILMONEYSTR_H/BITCOIN_UTIL_MONEYSTR_H/g' src/util/moneystr.h
sed -i 's/BITCOIN_UTILSTRENCODINGS_H/BITCOIN_UTIL_STRENCODINGS_H/g' src/util/strencodings.h
sed -i 's/BITCOIN_UTILTIME_H/BITCOIN_UTIL_TIME_H/g' src/util/time.h

sed -i 's/ util\.\(h\|cpp\)/ util\/system\.\1/g' src/Makefile.am
sed -i 's/utilmemory\.\(h\|cpp\)/util\/memory\.\1/g' src/Makefile.am
sed -i 's/utilmoneystr\.\(h\|cpp\)/util\/moneystr\.\1/g' src/Makefile.am
sed -i 's/utilstrencodings\.\(h\|cpp\)/util\/strencodings\.\1/g' src/Makefile.am
sed -i 's/utiltime\.\(h\|cpp\)/util\/time\.\1/g' src/Makefile.am

sed -i 's/-> util ->/-> util\/system ->/' test/lint/lint-circular-dependencies.sh
sed -i 's/src\/util\.cpp/src\/util\/system\.cpp/g' test/lint/lint-format-strings.py test/lint/lint-locale-dependence.sh
sed -i 's/src\/utilmoneystr\.cpp/src\/util\/moneystr\.cpp/g' test/lint/lint-locale-dependence.sh
sed -i 's/src\/utilstrencodings\.\(h\|cpp\)/src\/util\/strencodings\.\1/g' test/lint/lint-locale-dependence.sh
sed -i 's/src\\utilstrencodings\.cpp/src\\util\\strencodings\.cpp/' build_msvc/libbitcoinconsensus/libbitcoinconsensus.vcxproj
-END VERIFY SCRIPT-
2018-11-04 22:46:07 -08:00
DrahtBot
eb7daf4d60 Update copyright headers to 2018 2018-07-27 07:15:02 -04:00
lucash.dev@gmail.com
ebebedce20 speed up of tx_validationcache_tests by reusing of CTransaction.
The code was converting CMutableTransaction to CTransaction multiple times, which implies recalculating the hash multiple times. This commit fixes this by reusing a single CTransaction.
2018-06-06 06:50:25 -07:00
Wladimir J. van der Laan
f0fd39f376
Merge #13269: refactoring: Drop UpdateTransaction in favor of UpdateInput
6aa33feadb Drop UpdateTransaction in favor of UpdateInput (Ben Woosley)

Pull request description:

  Updating the input explicitly requires the caller to present a mutable
  input, which more clearly communicates the effects and intent of the call
  (and, often, the enclosing loop).

  In most cases, this input is already immediately available and need not be
  looked up.

Tree-SHA512: 8c7914a8b7ae975d8ad0e9d760e3c5da65776a5f79d060b8ffb6b3ff7a32235f71ad705f2185b368d9263742d7796bb562395d22b806d90e8502d8c496011e57
2018-06-05 19:06:16 +02:00
Ben Woosley
6aa33feadb
Drop UpdateTransaction in favor of UpdateInput
Updating the input explicitly requires the caller to present a mutable
input, which more clearly communicates the effects and intent of the method.

In most cases, this input is already immediately available and need not be
looked up.
2018-05-18 11:08:13 -07:00
MarcoFalke
faab55fbb1
Make CMutableTransaction constructor explicit
Silently converting to a CMutableTransaction will drop all caches
and should thus be done explicitly
2018-05-04 17:40:52 -04:00
practicalswift
c3f34d06be Make it clear which functions that are intended to be translation unit local
Do not share functions that are meant to be translation unit local with
other translation units. Use internal linkage for those consistently.
2018-05-03 21:47:40 +02:00
MarcoFalke
6b46288a08
Merge #12949: tests: Avoid copies of CTransaction
fae58eca93 tests: Avoid copies of CTransaction (MarcoFalke)

Pull request description:

  Avoid the copy (or move) constructor of `CTransaction` in test code, whereever a simple reference can be used instead.

Tree-SHA512: 8ef2077a277d6182996f4671722fdc01a90909ae7431c1e52604aab8ed028910615028caf9b4cb07a9b15fdc04939dea2209cc3189dde7d38271256d9fe1076c
2018-04-17 13:28:12 -04:00
Wladimir J. van der Laan
8480d41e0f
Merge #12803: Make BaseSignatureCreator a pure interface
be67831 Make DummySignatureCreator a singleton (Pieter Wuille)
190b8d2 Make BaseSignatureCreator a pure interface (Pieter Wuille)

Pull request description:

  * Removes the `m_provider` field from `BaseSignatureCreator`. Instead both a `SigningProvider` (which provides keys and scripts) and a `BaseSignatureCreator` (which implements the transaction-specific (or other) signing logic) are passed into and down in `ProduceSignature`, making the two concepts orthogonal.
  * Makes `BaseSignatureCreator` a pure interface without constructor, making it easier to implement new derivations of it (for example for message signing).
  * As `DummySignatureCreator` now becomes a stateless object, turn it into a singleton `DUMMY_SIGNATURE_CREATOR`.

Tree-SHA512: 5f1f4512e4ea7d02a31df7b9ede55008efa716c5b74a2630ca1c2fc6599584d8bf5f5641487266127f4b3788033803539fbd22b03ef1219c83c10da2d3da3dcd
2018-04-12 22:55:56 +02:00