Commit Graph

335 Commits

Author SHA1 Message Date
Marek Kotewicz
044d070667 rlp deserialization refactor, 30% faster (#4901)
* fixed naming of rlp modules

* RlpStream cleanup

* appending short rlp lists (0...55 bytes) is 25% faster

* RlpStream does not use bytes module, nor trait Stream

* removed unused code from rlp module

* compiling ethcore-util with new rlp serialization

* compiling parity with new rlp serialization

* fixed compiling ethcore-light with new rlp serialization

* fixed compiling ethsync with new rlp serialization

* moved rlp benches and rlp tests

* rlp deserialization refactor, 30% faster

* removed redundant comment, print

* fixed compiling parity with new rlp deserialization

* removed redundant double-space

* fixed failing test

* updated rlp docs, removed unused traits

* fixed rlp benchmarks

* replace usage of WriteBytesExt with ByteOrder

* removed unused, commented out code

* fixed merge conflict
2017-03-22 14:41:46 +01:00
Tomasz Drwięga
2dca24cc28 Traces error handling (#4849) 2017-03-14 13:04:32 +01:00
Marek Kotewicz
3fe3353696 removed redundant FixedHash trait, fixes #4029 (#4866) 2017-03-11 22:58:15 +04:00
Tomasz Drwięga
0ab0cb1173 Fix RPC errors. Implement geth-compatibility option to return correct pending nonce. (#4837) 2017-03-10 10:25:13 +01:00
Robert Habermeier
8a3b5c6332 Remote transaction execution (#4684)
* return errors on database corruption

* fix tests, json tests

* fix remainder of build

* buffer flow -> request credits

* proving state backend

* generate transaction proofs from provider

* network messages for transaction proof

* transaction proof test

* test for transaction proof message

* fix call bug

* request transaction proofs from on_demand

* most of proved_execution rpc

* proved execution future
2017-03-08 14:39:44 +01:00
Robert Habermeier
31302e057f provide uncle size where available (#4713) 2017-03-02 12:29:18 +01:00
Robert Habermeier
1bf2b27708 Propagate trie errors upwards from State (#4655)
* state backend trait mirroring state_db API

* minimal state backend trait

make state module public

* fix json tests

* return errors on database corruption

* fix tests, json tests

* fix remainder of build

* add Backend bound on state
2017-02-26 13:10:50 +01:00
Tomasz Drwięga
72998d3ce3 Proper default accounts RPCs (#4580)
* Default accounts setting - account provider

* RPC support for default accounts

* Updating JS code

* Rename whitelist to addresses
2017-02-20 16:33:12 +01:00
Robert Habermeier
54c48d14ec Deprecate eth_compile* RPCs (#4577)
* Deprecate eth_compile* RPCs

* Add deprecation doc comments
2017-02-17 12:00:33 +01:00
Tomasz Drwięga
5369a129ae Signer provenance (#4477)
* Signer - Tracking Request Provenance

* Basic UI

* Changing messages

* VecDeque::from

* Fix dapps tests

* Addressing UI grumbles
2017-02-14 22:45:43 +01:00
Robert Habermeier
0d09a473a7 remove let inner pattern with take_weakf and try_bf 2017-02-09 20:38:47 +01:00
Robert Habermeier
2ca61151ac squash some warnings 2017-02-08 16:59:04 +01:00
Robert Habermeier
5223e25aa6 use generic dispatcher everywhere, squash errors 2017-02-08 16:55:06 +01:00
Robert Habermeier
b32cb7a97d make total difficulty field optional 2017-02-06 15:28:16 +01:00
Robert Habermeier
7c9064c856 Merge branch 'master' into lightrpc 2017-02-04 22:30:20 +01:00
Tomasz Drwięga
248cd5e036 RPC middleware: Informant & Client.keep_alive (#4384)
* Adding RPC informant structs

* RPC informant

* Middleware counting RPC requests

* Moving client keep_alive to middleware
2017-02-04 22:18:19 +01:00
Robert Habermeier
024e69138a get it compiling 2017-02-03 17:41:25 +01:00
Robert Habermeier
9328067eac start eth RPC API for light client 2017-02-03 16:20:43 +01:00
Tomasz Drwięga
9fb2be8f2b Optional from field in Transaction Requests (#4332)
* Infering default account when sending transactions if not provided

* Fixing test

* Fixing tests code

* Fixes.

* More fixes.

* Final fix.
2017-01-30 21:08:36 +01:00
Tomasz Drwięga
bf1e7ecfcb Returning default account as coinbase + allow altering sender in signer (#4323)
* Returning first address as coinbase

* Allowing sender alteration in signer

* Adding default account RPC
2017-01-30 11:10:58 +01:00
Gav Wood
8404edb656 Fix whitespace (#4299)
* Fix whitespace.

* Update copyright years/owner.

* Push release only for tags.
2017-01-25 18:51:41 +01:00
keorn
c460aec646 Dont decode seal fields (#4263)
* dont decode seal

* add get_block test
2017-01-24 21:57:29 +01:00
Tomasz Drwięga
e11353f94c UnverifiedTransaction type (#4134)
* Introducing ValidSignedTransaction

* Verifiying transactions in engines

* Widening use of VerifiedSignedTransaction

* Renaming Transactions

* Uncommenting banning queue & Fixing tests

* Fixing json tests

* Fixing pre-homestead test

* Fixing imports

* Addressing grumbles

* Fixing test
2017-01-13 08:51:36 +00:00
Tomasz Drwięga
41da1a0a79 New jsonrpc-core with futures and metadata support (#3859)
* Bumping serde & serde_json

* Super-initial usage of new jsonrpc

* Single event loop for jsonrpc

* Metadata

* Supporting metadata extraction for eth_accounts

* Fixing Cargo.lock

* Removing uneccessary clones

* Fixing unused import

* Unused import

* Fixing test
2017-01-11 20:02:27 +01:00
Gav Wood
56c546f465 Another minor estimation fix (#4133)
* Return 0 instead of error with out of gas on estimate_gas

* Fix stuff up.

* Another estimate gas fix.

* Alter balance to maximum possible rather than GP=0.

* Only increase to amount strictly necessary.
2017-01-11 17:51:48 +01:00
Gav Wood
23feb7998f Use binary chop to estimate gas accurately (#4100)
* Initial sketch.

* Building.

* Fix a few things.

* Fix issue, add tracing.

* Address grumbles

* Raise upper limit if needed

* Fix test.
2017-01-10 18:56:41 +01:00
Robert Habermeier
fe1f542c4f Owning views of blockchain data (#3982)
* owning views of blockchain data

* port blockchain and client traits to owning views

* fix ethcore tests

* use strong headers and bodies in ethcore_light

* port ethsync to use owning views

* port rpc to owning views

* port parity informant and blockchain export
2016-12-28 12:44:51 +00:00
Robert Habermeier
8125b5690c Port try macro to new ? operator. (#3962)
* initial untry sweep

* restore try in ipc codegen, fix inference

* change a few missed try instances
2016-12-27 12:53:56 +01:00
Robert Habermeier
546246c56b Unknown block error for RPC (#3965) 2016-12-23 18:46:17 +01:00
Robert Habermeier
e1adc9606f parity_chainStatus RPC for block gap info 2016-12-19 15:27:17 +01:00
arkpar
f8961484c1 Merge branch 'master' of github.com:ethcore/parity into tx-block 2016-12-15 19:10:33 +01:00
arkpar
2952ea1b85 Delayed transactions 2016-12-15 18:19:19 +01:00
Gav Wood
db73b0d66f
Merge remote-tracking branch 'origin/master' into dapps-accounts-rpc 2016-12-15 13:28:37 +01:00
Tomasz Drwięga
f47be50843 Using jsonrpc-macros 2016-12-13 14:40:35 +01:00
Gav Wood
58b72c521d
Rename ethcore -> parity in licenses. 2016-12-11 19:31:31 +01:00
Tomasz Drwięga
4696d7f606 Additional RPCs for dapps accounts management 2016-12-10 12:36:04 +01:00
Gav Wood
5f1fcf95e0
Make *ID names consistent with std Rust (Id) 2016-12-09 23:01:43 +01:00
Tomasz Drwięga
cd6f565f69 RPC Middleware & Get/Set dapp-specific accounts 2016-11-23 16:27:05 +01:00
Tomasz Drwięga
5897e01dbd Correct format of eth_signTransaction 2016-11-18 11:03:29 +01:00
Tomasz Drwięga
2f98169539 In-browser signing support (#3231)
* Signer RAW confirmations

* Returning address book as eth_accounts

* UI support for in-browser signing

* Post review fixes

* Adding new methods to jsonrpc

* Fixing eth_accounts

* Deterministic accounts ordering
2016-11-10 11:27:05 +01:00
Tomasz Drwięga
b33b237f76 Refactoring Signer to auto_args + eth_signTransaction (#3261)
* Sign transaction initial

* Refactoring signer to auto_args
2016-11-09 13:13:35 +01:00
Tomasz Drwięga
501b2cdd18 Add error for sendRawTransaction and estimateGas (#3194)
* sendRawTransaction invalid RLP error

* Returning proper error for estimate_gas
2016-11-04 18:33:10 +01:00
Tomasz Drwięga
f31d42d0c5 Exposing engine extra info in block RPC (#3169)
* Exposing extra info in RPC

* Proper serialization and client trait API
2016-11-04 17:35:02 +01:00
Robert Habermeier
8599a11a0b Snapshot sync and block gap info in eth_syncing (#2948)
* provide snapshot sync info in eth_syncing

* specify block gap in eth_syncing

* Extend eth_syncing with warp, format the output properly

* adjust serialization tests for sync info

* whitespace
2016-10-31 17:32:53 +01:00
keorn
866ab9c7a3 Check queue to determine major importing (#2763)
* simplify major sync detection

* fix typos

* fix merge

* more realistic EthTester

* add new synced state

* remove Blocks synced state

* move is_major_importing to rpc crate and check queue

* add tests
2016-10-20 23:36:18 +02:00
keorn
aa52b04e31 Unify major syncing detection (#2699)
* simplify major sync detection

* fix typos

* fix merge

* more realistic EthTester

* add new synced state
2016-10-19 18:35:39 +02:00
Arkadiy Paronyan
487dfb0208 Snapshot sync part 2 (#2098)
* Split block downloader into a module

* Snapshot sync progress

* Warp sync CLI option

* Increased snapshot chunk and ping timeouts

* Fixed an issue with delayed writes

* Updated bootnodes

* Don't run pending IO tasks on shutdown

* Optional first_block; removed insert_snapshot_block

* Fixing expect calls

* Fixed stalled sync

* style and docs

* Update block_sync.rs

[ci:skip]
2016-10-18 18:16:00 +02:00
keorn
271bcf4d5d Return errors from eth_call RPC (#2498)
* propagate call errors

* add error code for execution error
2016-10-09 11:45:12 +02:00
Tomasz Drwięga
4655fd04a5 Using pending block only if not old (#2514) 2016-10-07 11:13:15 +01:00
Gav Wood
3fb3f1f54e Reorder transaction_by_hash to favour canon search (#2332)
* Reorder transaction_by_hash to favour canon search

* Fix build.

* Slightly cleaner function.

* Fix test.
2016-09-27 12:17:02 +02:00
Robert Habermeier
ff0be9f361 Separate RPC serialization from implementation (#2072)
* add auto-args deserialization for RPC

* make block param member public

* change BlockParam to a more generic Trailing<T> mechanism

* define work type

* build_rpc_trait macro, implement eth protocol

* fix up tests

* move eth_filter API to new macro
2016-09-23 19:42:33 +02:00
Gav Wood
07b5e9a5c7 Encryption, decryption and public key RPCs. (#1946)
* Fix up pending receipts details.

* Add support for additional params and registry over RPC.

* Fix tests.

* Add test, additional fix.

Fixes #1932.

* Fix up tests.

* Fix test.

* Fix test.

* Remove unused use.

* Add encryption, decryption and public-key RPCs.

* Remove &
2016-09-22 14:48:22 +02:00
Tomasz Drwięga
8c111da70b Limit for logs filter. (#2180)
* Limit for logs filter.

* Moving limit inside the filter object

* Fixing tests
2016-09-21 11:51:10 +01:00
Tomasz Drwięga
9ed9857fba Logs limit & log_index bug (#2073)
* Limiting number of logs

* Test for logs

* Fixing logs ordering and indexing

* Fixing sort

* unwrap -> expect

* Revert "unwrap -> expect"

This reverts commit e99e6e77f37692fe568448e768aa72775de8d0cd.
2016-09-14 12:02:30 +02:00
Arkadiy Paronyan
5c5d9c8ccd Snapshot sync (#2047)
* PV64 sync

* Tests

* Client DB restore

* Snapshot restoration over IPC

* Upating test

* Minor tweaks

* Upating test
2016-09-06 15:31:13 +02:00
Robert Habermeier
bb6243c550 merge with master 2016-09-01 15:07:06 +02:00
Robert Habermeier
d763664d16 port network, sync, rpc 2016-09-01 14:49:12 +02:00
Tomasz Drwięga
b4f3c4bd7a Asynchronous RPC support (#2017)
* Async RPC

* Limiting number of transactions in queue

* Fixing tests

* Bumping serde and jsonrpc-core

* serde updated to 0.8

* fixed failing tests

* Bumping ipc server

* Fixing API for endpoints

* Experimenting with tests without --release mode
2016-09-01 12:00:00 +02:00
Nipunn Koorapati
4389742ca3 Make the block header struct's internals private (#2000)
* Make the block header struct's internals private

Currently, this involves a lot of explicit cloning, but we
could migrate the return types of the get_* functions to
be copies rather than references since they are mostly copy
types anyway.

I opted to eliminate the constructor in favor of using
Default::default() plus calling a bunch of setters. This
is similar to the model that a Google Protobuf client uses
and I think it looks fine.

* Drop some unnecessary cloning by comparing references

* Fix compiler errors from callsites in tests.
2016-08-29 11:35:23 +02:00
Nipunn Koorapati
2a550c2adf Add timeout for eth_getWork call (#1975) 2016-08-23 17:07:00 +02:00
Gav Wood
ccdf80f4dc Fix several RPCs (#1926)
* Fix up pending receipts details.

* Add support for additional params and registry over RPC.

* Fix tests.

* Add test, additional fix.

Fixes #1932.

* Fix up tests.

* Fix test.

* Fix test.
2016-08-17 19:25:02 +02:00
Tomasz Drwięga
a427208f79 Purging .derefs, fixing clippy warnings. (#1890)
* Fixing clippy warnings

* Purging derefs

* Simplifying engine derefs

* Simplifying more engine derefs
2016-08-10 16:29:40 +02:00
debris
974d537849 Merge branch 'master' of github.com:ethcore/parity into move_hash 2016-08-09 09:58:18 +02:00
Tomasz Drwięga
59b0f8c7a3 RPC errors & logs (#1845)
* Refactoring errors in RPC

* Updating jsonrpc-core

* Fixing code_at

* Avoid mentioning obvious segments in proof

[ci:skip]
2016-08-08 17:25:15 +02:00
debris
1ed2de1d9b Merge branch 'master' of github.com:ethcore/parity into move_hash 2016-08-05 09:30:01 +02:00
Tomasz Drwięga
25aabe6e52 Supporting blockid in eth_call and trace_call/trace_raw (#1837)
* Supporting blockid in eth_call and trace_call/trace_raw

* Nicer state diff handling

* Purging deref.deref
2016-08-04 18:17:21 +02:00
debris
e8c451ac82 cleaning up hash reexports 2016-08-03 18:05:17 +02:00
Tomasz Drwięga
c5ffb5af79 No block number in get work while in geth-compat mode. (#1821) 2016-08-03 15:31:00 +02:00
Gav Wood
9de579366a Miner tweaks (#1797)
* Mining fixes.

- Use queue to determine whether we're mining
- Kick stale hash rates

Fixes #1794
Fixes #1641

* Fix tests.

* Address grumbles.
2016-08-02 17:53:32 +01:00
debris
489722b83f dynamic keys pickup 2016-07-31 10:46:28 +02:00
Gav Wood
b29329c3c5 Return storage as H256 from RPC. (#1774)
* Return storage as H256 from RPC.

* Fix test.
2016-07-30 14:42:52 -07:00
Gav Wood
861c8d0701 Size for blocks (#1668)
* Add size field for blocks.

* Ignore invalid test.
2016-07-19 20:40:18 +02:00
Gav Wood
3ba3dd3805 Asynchronous transactions (polling based for now). (#1652)
* Asynchronous transactions (polling based for now).

- Alter eth_sendTransaction to be async, returning one of:
  - Transaction hash (signed and submitted).
  - Transaction promise ID (< 32 bytes).
  - Zero hash (will never be signed).
- Introduce new JSONRPC eth_checkTransaction.

The new API call takes a single argument - a promise ID. It returns
either:
- Transaction hash (signed and submitted).
- null (still pending, call again later),
- Zero hash (will never be signed).

* New RPC eth_postTransaction

- Restore previous semantics of sendTransaction.
- Introduce eth_postTransaction.
- Some refactoring.

* Fix minor lockup.

* Use TransientHashMap to prevent leak.
2016-07-19 09:19:58 +02:00
NikVolf
be25e930e5 Merge branch 'master' into sync-svc 2016-07-16 15:57:30 +02:00
NikVolf
4cb1c906b0 rpc dependencies relayout 2016-07-16 15:51:06 +02:00
Gav Wood
2b193f00d4 Allow RPC to use solc to compile solidity (#1607)
* Allow use to use solc to compile solidity.

* Remove unneeded commemt.

[si:skip]

* Address grumble and disable incorrect tests.
2016-07-14 14:25:44 +02:00
Robert Habermeier
36d3d0d7d7 replace synchronization primitives with those from parking_lot (#1593)
* parking_lot in cargo.toml

* replace all lock invocations with parking_lot ones

* use parking_lot synchronization primitives
2016-07-13 19:59:59 +02:00
Robert Habermeier
7200cfcbc9 expunge &Vec<T> pattern (#1579)
* expunge &Vec<T> pattern

* fix travis
2016-07-12 10:28:35 +02:00
Gav Wood
9f43526c88 Merge branch 'master' into kill_unwraps 2016-07-07 09:40:12 +02:00
Nikolay Volf
8282c7dd50 Client IPC Interface (#1493)
* btree map serializer

* serde tests

* state diff serialization

* basic layout

* more missing serializaers

* uncle returns rlp

* block queue info

* sorting with transaction result

* sorting out util imports

* transaction import result sorting also

* sorting filters & ranges

* error sorting out

* deriving ipc service compiling

* rpc & sync recompile

* sorting rpc using uncles

* fix compilation

* fix merging bugs

* fix unused imports

* fix all warnings

* tests stub

* some merge bugs

* ethcore compilation

* fix rpc compilation

* deriving attribute

* tests (and fixes)

* rpc test working

* fix warnings again

* rs.in -> rs

* missing attribute

* refactored tree changes

* paste reformat mess fix

* pub mod actually

* intendation fix
2016-07-07 09:39:32 +02:00
Gav Wood
456ad9e21b Remove .lock().unwrap() idiom into locked(). 2016-07-06 19:52:34 +02:00
Marek Kotewicz
bcb63bce12 serde is no longer util dependency (#1534)
* removed old json-tests

* simplify folds in triehash.rs

* removed unused json_aid

* removed unused squeeze.rs

* json branching tests for trie

* removing todos from util

* separated UsingQueue and Table

* further cleanup, removing unused code

* serde serialization of hash moved to rpc module

* uint wrapper for rpc in progress

* serialization of uint moved to rpc module

* updated eth-secp256k1

* updated igd, serde is no longer dependency of util

* loading trie consensus tests

* renamed aliases in rpc imports
2016-07-06 11:23:29 +02:00
Gav Wood
c26cfc1c5a Silent running operating modes (#1477)
* Command=line options.

* Keep alive for the eth protocol.

* Wire up final pieces.

* No network when dark.

* Passive and dark mode work.

* Ensure all RPCs keep alive.

* Fix tests.

* Fix minor bug.

* Minor whitespace.

* Split out some of the sleep-state.

* Fix help text.
2016-07-05 17:50:46 +02:00
Nikolay Volf
8102fb9306 Client api cleaning - uncles are returned as rlp (#1516)
* uncle as rlp in the api

* uncle rlp in block view

* fix warning
2016-07-01 19:37:17 +01:00
Gav Wood
05927eba1f Include number in eth_getWork. 2016-06-29 15:43:34 +02:00
Gav Wood
a3758161ac Ensure we always get the latest work when mining on submitted. (#1469)
* Ensure we always get the latest work when mining on submitted.

* Build fix.

* Smaller timeslices for the wait.
2016-06-28 18:46:09 +02:00
Gav Wood
516b015325 Don't mine without --author (#1436)
Requires --author to be set before mining is allowed to happen.
2016-06-26 22:02:17 +02:00
Robert Habermeier
f947a9cb71 Optional gas price in transactions come from statistics (#1388)
* use gas price statistics for default transaction gas price

* create new signing queue client properly

* replace one more usage of sensible_gas_price

* fill_optional_fields as a free function

* keep test client alive
2016-06-22 15:55:07 +02:00
Marek Kotewicz
6b074e8fb2 secret store separated from util (#1304)
* bump rust-crypto

* initial version of account provider utilizing secret store

* update lazy_static to latest version

* AccountProvider accounts method

* new AccountProvider tests in progress

* basic tests for new AccountProvider

* ethcore compiles with new account provider and secret store

* ethcore-rpc build now compiling with new AccountProvider

* most rpc tests passing with new accounts_provider

* fixed basic_authority tests

* fixed eth_transaction_count rpc test

* fixed mocked/eth.rs tests

* fixed personal tests

* fixed personal signer rpc tests

* removed warnings

* parity compiling fine with new sstore

* fixed import direction

* do not unlock temporarily when we have the password

* removed TODO in account import

* display warning on auto account import failure

* fixed compiling of ethstore on windows

* ethstore as a part of parity repo

* added ethkey
2016-06-20 00:10:34 +02:00
Gav Wood
08522eec37 --geth prevent getTransactionReceipt from using pending. (#1325)
This mimics the fucntionality of Geth and the current unratified
JSONRPC spec (but not the functionality of eth and the ratified
spec).
2016-06-19 14:51:51 +02:00
Marek Kotewicz
75a7cf2860 fixed #1180 (#1282) 2016-06-18 12:09:29 +02:00
Tomasz Drwięga
1baa150086 Consolidating all RPC error codes 2016-06-18 10:54:15 +02:00
Tomasz Drwięga
defe688797 Fixing returned value 2016-06-18 10:54:15 +02:00
Gav Wood
335bce85e8 Gas price statistics. (#1291)
* Gas price statistics.

Affects eth_gasPrice.
Added ethcore_gasPriceStatistics.

Closes #1265

* Fix a bug in eth_gasPrice

* Fix tests.

* Revert minor alteration.

* Tests for gas_price_statistics.

- Tests;
- Additional infrastructure for generating test blocks with
transactions.
2016-06-18 10:52:50 +02:00
debris
dac387fac1 changed rpc error message to Still Syncing, when mining is not ready 2016-06-15 01:12:46 +02:00
debris
7610d308e8 fixed #1255 2016-06-14 15:17:17 +02:00
Marek Kotewicz
c8c47ebe32 Merge pull request #1206 from ethcore/diffing
Integrate state diffing into the ethcore JSONRPC
2016-06-05 21:35:36 +02:00
Tomasz Drwięga
18dac64abb Simple WebSockets notification about new request (#1202)
* Splitting methods requiring signing into separate trait

* Single place where RPC apis are created.

* Separating eth_filter

* Separating eth_signing

* Stubs for Personal Signer methods

* Test for EthSigningQueueClient

* TransactionConfirmation API

* Exposing PersonalSigner API

* Defining ApiSets dependent on context

* Removing types

* Supporting sending notification to WS connected SystemUIs

* Sending a notification on every new messages

* Adding logs to signing queue

* Shutting down broadcaster

* Refactoring the signing queue

* Fixing wait loop in case of spurious wake-ups.
2016-06-02 17:05:13 +02:00
Gav Wood
b17581d7de VM tracing and JSON RPC endpoint for it. (#1169)
* Groundwork for basic VM tracing.

* RPC endpoint for VM tracing and ser/de types ready.

* Create VMTracer trait.

* Rearchitected VM tracing to reflect existing tracing.

Should more or less work now.

* Integrated VM tracing into JSONRPC.

* Fix ethcore module tests.

* Add tests for VM tracing.

* Fix consensus test code.

* Fix mock tests.

* Added VM trace information for post-execution stuff.

* Fix max-value calls and add "creates" field to getTransaction.

* Tests for VM tracing.

* Don't implement the trait with unimplemented.

* Remove invlaid comment.

* Fix tests.
2016-06-02 12:40:31 +02:00
Gav Wood
bc5c3da2af Merge branch 'vmtracing' into diffing 2016-06-02 12:28:09 +02:00