Commit Graph

19030 Commits

Author SHA1 Message Date
thephez
3f51db3401
docs: fix typo in addmultisigaddress (#3952) 2021-01-20 17:30:14 -05:00
UdjinM6
e9341da0a7
spork: Fix a couple of issues with multikey sporks cleanup, add more tests (#3947)
* Fix a couple of issues with multikey sporks cleanup

1. Should remove sporks with signatures from unknown signers from mapSporksActive
2. Should advance itSignerPair while doing (1)...

* tests: make sure sporks cleanup works as expected for multikey sporks

* tests: make sure multiple multikey sporks (and their cleanups) work together as expected

* Prettify node extra args
2021-01-20 17:27:41 -05:00
UdjinM6
e6a351993b
privatesend: Track mixing rounds via CTxDSIn and not via CTxOut (#3950)
* Do not use CTxDSIn when we don't care about PS rounds

Also refactor CreateCollateralTransaction

* Track input rounds via CTxDSIn and not via CTxOut

* refactor: Create collateral transactions in CPrivateSendClientSession

Co-authored-by: xdustinface <xdustinfacex@gmail.com>
2021-01-20 11:38:05 -05:00
UdjinM6
dcad667e17
wallet: Detect potential deadlocks in AddToWallet (#3949) 2021-01-20 11:36:09 -05:00
UdjinM6
fc92f8e13e
wallet: Update wallet utxo set when new keys are found for already known transactions (#3944)
* wallet: Update wallet utxo set when new keys are found for already known transactions

* Update src/wallet/wallet.cpp

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
2021-01-20 11:35:46 -05:00
UdjinM6
611511589d
privatesend: Calculate base size in CTransactionBuilder ctor based on actual scriptPubKey-s (#3938)
* Store CInputCoin-s instead of COutpoint-s in CompactTallyItem

* Calculate base size in CTransactionBuilder ctor based on actual scriptPubKey-s

It breaks on non-p2pkh otherwise.
2021-01-20 11:31:51 -05:00
Wladimir J. van der Laan
888f36abe7
Merge #19534: net: save the network type explicitly in CNetAddr
bcfebb6d5511ad4c156868bc799831ace628a225 net: save the network type explicitly in CNetAddr (Vasil Dimov)
100c64a95b518a6a19241aec4058b866a8872d9b net: document `enum Network` (Vasil Dimov)

Pull request description:

  (chopped off from https://github.com/bitcoin/bitcoin/pull/19031 to ease review)

  Before this change, we would analyze the contents of `CNetAddr::ip[16]`
  in order to tell which type is an address. Change this by introducing a
  new member `CNetAddr::m_net` that explicitly tells the type of the
  address.

  This is necessary because in BIP155 we will not be able to tell the
  address type by just looking at its raw representation (e.g. both TORv3
  and I2P are "seemingly random" 32 bytes).

  As a side effect of this change we no longer need to store IPv4
  addresses encoded as IPv6 addresses - we can store them in proper 4
  bytes (will be done in a separate commit). Also the code gets
  somewhat simplified - instead of
  `memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0` we can use
  `m_net == NET_IPV4`.

ACKs for top commit:
  troygiorshev:
    reACK bcfebb6d5511ad4c156868bc799831ace628a225 via `git range-diff master 64897c5 bcfebb6`
  jonatack:
    re-ACK bcfebb6 per `git diff 662bb25 bcfebb6`, code review, debug build/tests clean, ran bitcoind.
  laanwj:
    Code review ACK bcfebb6d5511ad4c156868bc799831ace628a225

Tree-SHA512: 9347e2a50feac617a994bfb46a8f77e31c236bde882e4fd4f03eea4766cd5110216f5f3d24dee91d25218bab7f8bb6e1d2d6212a44db9e34594299fd6ff7606b
Signed-off-by: pasta <pasta@dashboost.org>

# Conflicts:
#	src/netaddress.cpp
#	src/netaddress.h
2021-01-18 16:12:49 -05:00
Wladimir J. van der Laan
3af7c994db
Merge #19351: test: add two edge case tests for CSubNet
ccef5d7bf0af8377c6c779295f7b41d5af435c47 test: add two edge case tests for CSubNet (Vasil Dimov)

Pull request description:

  This is chopped off from https://github.com/bitcoin/bitcoin/pull/19031. It is needed because later 19031 modifies the related code and the tests ensure that no surprising changes in behavior sneak in.

ACKs for top commit:
  practicalswift:
    ACK ccef5d7bf0af8377c6c779295f7b41d5af435c47 -- more test coverage is better than less test coverage :)
  laanwj:
    ACK ccef5d7bf0af8377c6c779295f7b41d5af435c47
  hebasto:
    ACK ccef5d7bf0af8377c6c779295f7b41d5af435c47, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: 6d386672b6598aeddd33dabe3512e816cf548d5c1af56c4c9e6f897d513b62ba4659cde73405811a0df286ffee3a3f084ab7caf8e3a2086fa9ddecd1bdcb3c67
2021-01-18 16:12:49 -05:00
Wladimir J. van der Laan
233232ce3e
Merge #15689: netaddress: Update CNetAddr for ORCHIDv2
8be3f3063 netaddress: Update CNetAddr for ORCHIDv2 (Carl Dong)

Pull request description:

  ```
  The original ORCHID prefix was deprecated as of 2014-03, the new
  ORCHIDv2 prefix was allocated by RFC7343 as of 2014-07. We did not
  consider the original ORCHID prefix routable, and I don't see any reason
  to consider the new one to be either.
  ```

  Would like to know if people think this kind of thing is even worth keeping the codebase updated for. Perhaps it'd be nice to write a devtool to pull the csv from [here](https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml) and generate the code.

ACKs for commit 8be3f3:
  laanwj:
    utACK 8be3f3063
  ryanofsky:
    utACK 8be3f306338e27b3fa3ad3bfb75f822d038909a5. Only change since last review is rebasing after #15718 merge.

Tree-SHA512: 7c93317f597b1a6c1443e12dd690010392edb9d72a479a8201970db7d3444fbb99a80b98026caad6fbfbebb455ab4035d2dde79bc9263bfd1d0398cd218392e1
2021-01-18 16:12:49 -05:00
pasta
a9a9c3d865
Very partial merge bitcoin#19219
Signed-off-by: pasta <pasta@dashboost.org>
2021-01-18 16:12:49 -05:00
UdjinM6
78328c1898
Fix CService (de)serialization 2021-01-18 16:12:41 -05:00
PastaPastaPasta
f4c39a5897
Simplify PreVerifyInstantSendLock (#3941)
Signed-off-by: pasta <pasta@dashboost.org>
2021-01-18 20:29:10 +01:00
dustinface
ddb57ce2a3
llmq: Some refactoring in CQuorumManger (#3935)
* llmq: Refactor CQuorumManager::{BuildQuorumFromCommitment, GetQuorum}

Construct and cache new quorums inside BuildQuorumFromCommitment

* llmq: Make all methods of CQuorumManager const
2021-01-18 13:54:50 -05:00
dustinface
bdbadc1809
llmq:: Return const reference in GetLLMQParams() and move it out of CLLMQUtils (#3936)
* llmq: Return const reference in CLLMQUtils::GetLLMQParams

* llmq: Move GetLLMQParams out of CLLMQUtils
2021-01-18 01:27:29 +01:00
UdjinM6
482ba4f5ae
Always mark conflicting blocks with BLOCK_CONFLICT_CHAINLOCK flag (#3924)
* More accurate handling of the BLOCK_CONFLICT_CHAINLOCK flag

* Update test/functional/feature_llmq_chainlocks.py

Co-authored-by: thephez <thephez@users.noreply.github.com>

* tests: make sure that previous tip on the reorged node is marked conflicting after chainlock

* Apply suggestions from code review

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>

Co-authored-by: thephez <thephez@users.noreply.github.com>
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
2021-01-16 14:47:13 -05:00
Wladimir J. van der Laan
e8c6989e95
Merge #19360: net: improve encapsulation of CNetAddr
bc74a40a56128f81f11151d5966f53b82f19038c net: improve encapsulation of CNetAddr (Vasil Dimov)

Pull request description:

  Do not access `CNetAddr::ip` directly from `CService` methods.

  This improvement will help later when we change the type of
  `CNetAddr::ip` (in the BIP155 implementation).

  (chopped off from https://github.com/bitcoin/bitcoin/pull/19031 to ease review)

ACKs for top commit:
  dongcarl:
    ACK bc74a40a56128f81f11151d5966f53b82f19038c
  naumenkogs:
    ACK bc74a40
  fjahr:
    Code review ACK bc74a40
  laanwj:
    code review ACK bc74a40a56128f81f11151d5966f53b82f19038c
  jonatack:
    ACK bc74a40a56128f81f11151d5966f53b82f19038c
  jnewbery:
    ACK bc74a40a5

Tree-SHA512: 29a203905538e8311e3249b78565abe69ce36dc4ec239bec85c726c30e1a7b55b0aaf5c6659b676935008e068cfa53d716f7a598469064108daf130f94329a5d
2021-01-16 01:21:16 -05:00
dustinface
4a6eee2511
test: Check for the actual llmq_test session, not just for any (#3934) 2021-01-15 21:59:42 -05:00
dustinface
59991bec25
test/refactor: Fix typo, remove_mastermode -> remove_masternode (#3931) 2021-01-14 14:00:57 -06:00
UdjinM6
1f1f2d8078
refactor: Rename fMasternode and fMasternodeProbe (#3928)
* fMasternode -> m_masternode_connection

* fMasternodeProbe -> m_probe_connection

* probe_connection -> masternode_probe_connection
2021-01-14 13:59:18 -06:00
Kolby Moroz Liebl
3ee7c291b0
qt: Add masternode info to peer page (#3927)
* Add masternode info to peer page

* Update src/qt/forms/debugwindow.ui

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>

* Use verifiedProRegTxHash to check if node is masternode

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
2021-01-14 13:55:06 -06:00
dustinface
cc8a1bc19c
llmq|rpc|test: Add optional "submit" parameter to "quorum sign" (#3917)
* llmq: Split CSigShare creation/processing in CSigSharesManager

* rpc: Add "submit" parameter to "quorum sign"

* test: Add CSigShare and msg_qsigshare to messages.py

* test: Test the optional "submit" parameter of "quorum sign"
2021-01-14 20:53:26 +01:00
Kittywhiskers Van Gogh
4f38f5c2ef
Partial merge bitcoin#14624: Some simple improvements to the RNG code (#3923)
* random: Introduce std::shuffle alternative for FastRandomContext

3db746beb4

* random: change std::random_shuffle calls to std::shuffle

https://en.cppreference.com/w/cpp/algorithm/random_shuffle (deprecated in c++14)

* random: change FastRandomContext std::random_shuffle calls to shuffle

* random: change last std::shuffle calls to Shuffle

std::shuffle doesn't accept only two arguments so we use FastRandomContext()

* llmq: use inherited FastRandomContext

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>

* llmq: use inherited FastRandomContext

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>

* Make the linter happy :)

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
2021-01-14 13:46:16 -06:00
UdjinM6
38ac83e385
Do not store hashes in ProcessPendingMessageBatch and do not pass them to ReceiveMessage-s (#3921)
* Do not store hashes in ProcessPendingMessageBatch and do not pass them to ReceiveMessage-s

* follow up: refactor/unify code in ProcessPendingMessageBatch
2021-01-14 13:42:08 -06:00
dustinface
a3a391dd32
rpc|test: Improve platform restrictions, add new commands to the whitelist (#3918)
* rpc: Rename platformAllowedCommands => mapPlatformRestrictions

* rpc: Use std::multimap instead of std::map for mapPlatformRestrictions

* rpc|init: Move restrictions to CRPCTable and initialize them in seperate

This is to allow restrictions based on the currently active network.

* rpc: Allow multiple parameter of type UniValue for mapPlatformRestrictions

* rpc: Add "quorum {sign,verify}" to the platform-user whitelist

* test: Add "quorum {sign, verify}" tests, test some invalid combinations

* rpc|test: Add verifyislock to platform-user whitelist
2021-01-14 13:39:34 -06:00
tomthoros
4ce3635d99
Consensus: DIP-0020: Dash opcode updates. Remaining dip0020 opcodes (#3893)
* DIP-0020: Dash opcode updates - enable AND, OR, XOR

* DIP-0020: Dash opcode updates - enable DIV, MOD

* DIP-0020: Dash opcode updates - enable BIN2NUM, NUM2BIN

* DIP-0020: Dash opcode updates - enable CHECKDATASIG, CHECKDATASIGVERIFY (no tests)

* DIP-0020: Dash opcode updates - fix whitespace

* DIP-0020: Dash opcode updates - add checkdatasig and datacheckdatasigverify json tests

* More AND_OR_XOR tests

* DIP-0020: Dash opcode updates - move opcodes enabled tests around. Add unit tests back

* DIP-0020: Dash opcode updates - sort BITCOIN_TESTS aplhabetically

* DIP-0020: Dash opcode updates - formatting

* DIP-0020: Dash opcode updates - formatting

* DIP-0020: Dash opcode updates - formatting references alignment

* DIP-0020: Dash opcode updates - formatting references alignment

* Update src/script/interpreter.h

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>

* Update src/script/interpreter.h

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>

* Update src/test/script_tests.cpp

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
2021-01-13 14:45:04 -06:00
PastaPastaPasta
79ef4f8dee
Adjust version formatting and add formatted version to rpc (#3908)
* Always show full version precision

Signed-off-by: pasta <pasta@dashboost.org>

* add field "formattedversion" to `getnetworkinfo` that is the version, to include rc info, commit info, dirty, etc as available

Signed-off-by: pasta <pasta@dashboost.org>

* use `buildversion` instead of `formattedversion`

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>

* adjust unit tests

Signed-off-by: pasta <pasta@dashboost.org>

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
2021-01-11 20:34:42 +01:00
dustinface
0f62d55af6
llmq|rpc|test: Fix "quorumHash" parameter of "quorum sign" (#3914)
* llmq: Add an optional quorum hash to CSigningManager::AsyncSignIfMember

Allows to select the quorum to sign by its hash.

* rpc: Fix quorum selection of "quorum sign"

* test: Test the optional "quorumHash" parameter of "quorum sign"

* llmq: Move quorum checks up to avoid calling WriteVoteForId if they fail
2021-01-11 11:17:41 -06:00
UdjinM6
f3e8401da5
rpc: Introduce verifyislock (#3906)
* Introduce `verifyislock` rpc

* Update test/functional/rpc_verifyislock.py

Co-authored-by: PastaPastaPasta <6443210+PastaPastaPasta@users.noreply.github.com>

Co-authored-by: PastaPastaPasta <6443210+PastaPastaPasta@users.noreply.github.com>
2021-01-11 11:13:50 -06:00
Kolby Moroz Liebl
724db5e1cb
rpc: Add runtime error for Generate commands when the build compiles without mining support (#3922)
* Add runtime error for generate commands when builds compile without mining support

* Update src/rpc/mining.cpp

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>

* Update src/wallet/rpcwallet.cpp

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
2021-01-10 21:30:24 -06:00
dustinface
885dcb1b66
refactor: Drop some unused code (#3919)
* llmq: Drop hash parameter in PreVerifyMessage methods

* llmq: Drop some unused variables

* rpc: Drop unused variable

* llmq|net: Drop some unused CConnman parameter

* llmq: Drop some unused quorum parameter

* llmq: Drop some unused nodeId parameter

* Drop unused variables

* llmq: Drop more

Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
2021-01-10 21:28:37 -06:00
UdjinM6
8178b297ee
spork: Introduce SPORK_23_QUORUM_POSE (#3907)
This splits SPORK_21_QUORUM_ALL_CONNECTED into two which should let us control node connectivity and quorum PoSe individually.
2021-01-10 21:23:01 -06:00
UdjinM6
074318a9ba
rpc: Introduce quorum verify (#3904)
* rpc: Introduce `quorum verify`

* test: Test both "quorum not found" paths

* rpc: Check both "quorum not found" failures in one place

* rpc: Adjust description of "quorum verify"

* auto -> int

Co-authored-by: xdustinface <xdustinfacex@gmail.com>
2021-01-10 21:21:16 -06:00
PastaPastaPasta
84ed589c15
Merge pull request #3903 from UdjinM6/bp11372
Backport 11167 (partial), 11372, 11630 and 14242
2021-01-10 21:20:47 -06:00
UdjinM6
7b3bac65eb
tests: fix random feature_dip4_coinbasemerkleroots.py failures (#3916) 2021-01-08 13:56:32 -06:00
UdjinM6
c4e269cf0c
A couple of fixes for stats (#3920)
* Use gaugeDouble for hashrate and difficulty stats

* Add transactions.totalTransactions gauge

Also group "transactions" gauges in PeriodicStats
2021-01-08 13:45:57 -06:00
UdjinM6
51027eed43
tests: Test all rpc commands in rpc_platform_filter.py (#3913)
* tests: Test all rpc commands in rpc_platform_filter.py

* bugfix: test "debug 1" instead of "stop" to avoid interference with the regular test shutdown process

* Apply suggestions from code review

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>

Co-authored-by: dustinface <35775977+xdustinface@users.noreply.github.com>
2021-01-08 13:43:59 -06:00
UdjinM6
171b17523f
Fix quorum selection for low heights (#3912) 2021-01-08 13:39:40 -06:00
dustinface
aff2d47ee8
llmq: Improve/Fix GetVerifiedContributions (#3911)
* llmq: Fix GetVerifiedContribution to return false in case of failure

* llmq: Move GetVerifiedContribution into GetVerifiedContributions

* llmq: Drop GetVerifiedContribution

* llmq: Keep cache locked while building GetVerifiedContributions result

* llmq: Read from DB into vvecPtr directly
2021-01-08 13:36:26 -06:00
Wladimir J. van der Laan
5cf45844d8
Merge #14242: Avoid triggering undefined behaviour (std::memset(nullptr, 0, 0)) if an invalid string is passed to DecodeSecret(...)
d855e4cac8303ad4e34ac31cfa7634286589ce99 Avoid triggering undefined behaviour (std::memset(nullptr, 0, 0)) if an invalid string is passed to DecodeSecret(...) (practicalswift)

Pull request description:

  Avoid triggering undefined behaviour (`std::memset(nullptr, 0, 0)`) if an invalid string is passed to `DecodeSecret(...)`.

  Background reading: [memcpy (and friends) with NULL pointers](https://www.imperialviolet.org/2016/06/26/nonnull.html)

  Steps to reproduce:

  ```
  ./configure --with-sanitizers=undefined && make check && ./test/functional/test_runner.py
  ```

Tree-SHA512: b8325ced4f724d9c03065e0747af56b1f297a90d9fb09a24d46c3231a90dce3df6299f2c41f863b5cec18eaeded7b46ee4b93d9a52adc2541eb4c44d2c0965d9
2021-01-08 22:35:46 +03:00
Wladimir J. van der Laan
fbb40717b4
Merge #11630: Simplify Base32 and Base64 conversions
b3ea8ccb7 Simplify Base32 and Base64 conversions (Pieter Wuille)
3296a3bb7 Generalize ConvertBits (Pieter Wuille)

Pull request description:

  Generalize `ConvertBits` a bit to also be usable for the existing Base32 and Base64 convertions (rather than just for Bech32).

Tree-SHA512: 3858247f9b14ca4766c08ea040a09b1d6d70caaccc75c2436a54102d6d526f499ec07f5bdfcbbe16cbde5aae521cd16e9aa693e688a97e6c5e74b8e58ee55a13
2021-01-08 22:35:46 +03:00
Wladimir J. van der Laan
70c82570b2
Merge #11372: Address encoding cleanup
92f1f8b31 Split off key_io_tests from base58_tests (Pieter Wuille)
119b0f85e Split key_io (address/key encodings) off from base58 (Pieter Wuille)
ebfe217b1 Stop using CBase58Data for ext keys (Pieter Wuille)
32e69fa0d Replace CBitcoinSecret with {Encode,Decode}Secret (Pieter Wuille)

Pull request description:

  This PR contains some of the changes left as TODO in #11167 (and built on top of that PR). They are not intended for backporting.

  This removes the `CBase58`, `CBitcoinSecret`, `CBitcoinExtKey`, and `CBitcoinExtPubKey` classes, in favor of simple `Encode`/`Decode` functions. Furthermore, all Bitcoin-specific logic (addresses, WIF, BIP32) is moved to `key_io.{h,cpp}`, leaving `base58.{h,cpp}` as a pure utility that implements the base58 encoding/decoding logic.

Tree-SHA512: a5962c0ed27ad53cbe00f22af432cf11aa530e3efc9798e25c004bc9ed1b5673db5df3956e398ee2c085e3a136ac8da69fe7a7d97a05fb2eb3be0b60d0479655

Make linter happy

Dashify
2021-01-08 22:35:34 +03:00
Pieter Wuille
c9936a5115
Partial merge bitcoin#11167: Full BIP173 (Bech32) support
Implement {Encode,Decode}Destination without CBitcoinAddress

Import Bech32 C++ reference code & tests

This includes a reformatted version of the Bech32 reference code
(see https://github.com/sipa/bech32/tree/master/ref/c%2B%2B), with
extra documentation.

Convert base58_tests from type/payload to scriptPubKey comparison

Add regtest testing to base58_tests

Implement ConvertBits

A part of "Implement BIP173 addresses and tests"

Make linter happy
2021-01-08 22:35:13 +03:00
UdjinM6
72f2e50e54
Use build badges provided by Gitlab (#3915) 2021-01-08 13:33:50 -06:00
UdjinM6
52cbc7fe0d
Extend activation timeout for all past bits (#3905)
Set `nTimeout` to `999999999999ULL` on testnet and devents for all bits that were activated on mainnet already to ensure they are going to be activated on future network resets.
2020-12-31 15:43:43 +01:00
PastaPastaPasta
9aaa23072c
Merge pull request #3886 from xdustinface/backport-11536
backport: Deprecate accounts
2020-12-30 13:38:17 -06:00
UdjinM6
a06eba3eb9
Implement kqueue support (#3892) 2020-12-30 13:34:42 -06:00
UdjinM6
bfe6c7ca5e
Fix thread names to fit into 15 symbols (#3897) 2020-12-30 13:33:45 -06:00
UdjinM6
8d0ff7d441
Fix versionbits cache usage in IsQuorumTypeEnabled (#3901) 2020-12-29 11:30:50 +01:00
UdjinM6
2faf8744bd
Do not shadow sigSharesToAnnounce (#3902)
Rename `sigSharesToAnnounce` class member in `CSigSharesManager` to `sigSharesQueuedToAnnounce` to avoid confusion with local variables/function args with the same name
2020-12-28 12:27:33 +01:00
UdjinM6
f1eaaf0f24
trivial: Fix release-notes-0.16.0.1 file extension (#3900) 2020-12-28 12:24:07 +01:00