Add worker pool to the listener to prevent blocking. It is used only for
notary notifications and new block events handling since it uses RPC
calls. That may lead to the deadlock state: neo-go cannot send RPC until
notification channel is read but notification channel cannot be read since
neo-go client cannot send RPC.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Updated client now supports subscription to chain notifications and RPC
switch between provided RPC endpoints.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Provide current heights as an argument to ticker.
Zero height disables any checks, thus corresponding to the old
behaviour. If non-zero height is used, ignore the tick if the height
is less than the timer tick state.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
After `Listen` has raw receiver and calls `listen` which has pointer
receiver, leading to ineffectual assign to `started` field.
Always use `listener` by pointer, to avoid similar bugs.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Prevent attemts to connect to the failing endpoint multiple times.
This speeds up all invocations a bit and removes excessive error logs.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Replace `core/container.ErrNotFound` error returned by `Source.Get`
interface method with `apistatus.ContainerNotFound` status error. This
error is returned by storage node's server as NeoFS API statuses.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In some places we panic, in some we return error, in some (audit) just return a client.
However in all of the places static client is created immediately before
the sugared-client creation.
This commit makes all constructors to just return a client for the sake
of code simplification and unification.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
We don't use custom names and the only place where custom method option
is used it provides the default name and can be omitted.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
It is much more convenient to skip source creation.
Also fix some bugs:
1. `cryptoSource.Int63()` now returns number in [0, 1<<63) as required
by `rand.Source` interface.
2. Replace `cryptoSource.Uint63()` with `cryptoSource.Uint64` to allow
generate uint64 numbers directly (see rand.Source64 docs).
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
In notary disabled environment, approval of container creation with nice
name attribute takes much more additional GAS than other operations
(due to NNS invocation).
Morph library changes:
* add the ability to specify per-op fees using `StaticClient` options;
* add the ability to customize fee for `Put` operation with named
container in container morph client.
Inner Ring changes:
* add `fee.named_container_register` config value which specifies
additional GAS fee for the approvals of the named container
registrations;
* pass the config value to `WithCustomFeeForNamedPut` option of
container morph client.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Use persistent flags on parent command in order to inherit flags in
sub-commands. Turn on notary mode of morph client in `subnet` command of
admin utility for notary environments.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `Client.EnableNotarySupport` method to call `NNSContractAddress`
for proxy contract if it is not specified in corresponding option.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add `subnet` command which contains all subnet-related commands. Add
sub-commands:
* `create` for creation;
* `remove` for removal;
* `get` for reading;
* `admin` for admin management;
* `client` for client management.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Define notification events, implement parsers. Add morph client of
Subnet contract. Listen, verify and approve events in Inner Ring app.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add hash of the TX that generated notification
to neofsid event structures. Adapt all
neofsid wrapper calls to new structures.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add hash of the TX that generated notification
to neofs/netmap event structures. Adapt all
neofs/netmap wrapper calls to new structures.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add optional parameters to the client call
signature. Group parameters of a client call
into struct to improve future codebase
support.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add optional parameters to the client call
signature. Group parameters of a client call
into struct to improve future codebase
support.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Parsers should have original notification
structure to be able to construct internal
event structure that contains necessary
for unique nonce calculation information.
So notification parsers take raw notification
structure instead of slice of stack items.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Also, add ErrNNSRecordNotFound error that
indicates that required hash is not presented
in `NNS` contract.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Do not set `till` as some constant:
use maximum of two values instead:
1. currentDepositTill;
2. currentHeight+epochDuration+constant.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add name and zone arguments to `Put` method of wrapper over the Container
contract client. Pass result of `container.GetNativeNameWithZone` function
to the method in `Put` helper function. Due to this, the storage node will
call the method depending on the presence of the container name in the
attributes.
Make IR to listen `putNamed` notification event. The event is processed like
`put` event, but with sanity check of the container attributes.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add `PutArgs.SetNativeNameWithZone` method which sets native name and zone
for container. Call `putNamed` method of Container contract if name is set,
otherwise call `put` method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `ParsePutNamedNotary` function which parses `PutNamed` structure
from `event.NotaryEvent`. Share common code with `ParsePutNotary` function.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Define `PutNamed` structure of notary notification from `putNamed` method of
Container contract. Embed `Put` type in order to inherit methods and
parsing of common parts with `put` method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `StringFromOpcode` function that tries to retrieve `string` to
`Op`. Add a comment about neo-go source code that is used for implementation
of converters.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`WSClient` of Neo Go v0.97.3 sets value of notification with
`NotificationEventID` to `subscriptions.NotificationEvent` type which wraps
previously used `state.NotificationEvent`.
Change type cast and pull `state.NotificationEvent` structure from new type.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `Client.ListConfig` method which calls `listConfig` method of
Netmap contract. Implement `Wrapper.IterateConfigParameters` method which
uses previous one. Implement `wrapper.WriteConfig` helper function which
allows to interpret parameters by names.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a need to inherit some methods of `StaticClient` type. In order to
not inherit all method via type embedding we can group sub-set of methods
and inherit it.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Do not pass high level `PACK` opcode to
notary parsers. Add opcode amount check.
Delete `PACK` cases in notary parsers.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Remote RPC node might be in the transition state and produce
events from the past. We should avoid listening such nodes.
To do that subscriber component can await minimal height of
remote node. If minimal height is not reached, then throw
error.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Implement `NotaryContractProcessor` by IR
container processor. Add support for notary
`put` container operation. Do not parse `put`
non-notary notifications in notary enabled
environment.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add `NotarySignAndInvokeTX` method to morph
client. This function allows invoking notary
request with passed main TX(not creating a
new one). It signs passed main TX with
client's key.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add `NotaryInvokeNotAlpha` to low-level
client. It creates and sends notary request
that must be signed by Alphabet nodes, but
does not sign it by current node's private
key.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add preparator for notary requests. Is parses
raw notary requests, checks if it should be
handled by Alphabet node. If handling is required,
returns `NotaryEvent` that contains information
about contract scripthash, method name and
arguments of the call.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Prepare all listening structures for notary events:
rename(add prefix/suffix 'notification') all
notification specific handlers/parsers.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
`fallbackTime` is delta b/w `ValidUntilBlock` of
the main transaction and block when `fallback`
transaction is sent.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Caching is performed inside `GetNativeContractHash` method of neo-go client,
so the additional cache level is redundant.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is no need to continue iterating over Neo RPC endpoints in case of
some address-independent error (e.g. NeoFS logic error).
Unwrap and immediately return `neofsError` errors from loop in
`iterateClients`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `error` interface on new `neofsError` type which is a wrapper over
NeoFS-specific error. Wrap all `Client` errors except neo-go client API ones
into `neofsError`. Wrapped errors are going to be used for multi-endpoint
loop control.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Since morph `Client` works in multi-client mode, there is an error case when
we can not get network magic when all endpoints are unavailable.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There is a need to work with a set of Neo RPC nodes in order not to depend
on the failure of some nodes while others are active.
Support "multi-client" mode of morph `Client` entity. If instance is not
"multi-client", it works as before. Constructor `New` creates multi-client,
and each method performs iterating over the fixed set of endpoints until
success. Opened client connections are cached (without eviction for now).
Storage (as earlier) and IR (from now) nodes can be configured with multiple
Neo endpoints. As above, `New` creates multi-client instance, so we don't
need initialization changes on app-side.
`Wait` and `GetDesignateHash` methods of `Client` return an error from now
to detect connection errors. `NotaryEnabled` method is removed as unused.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Do not read `without_notary` config value from env.
Make morph client constructor return client without
notary support. Enabling notary support should be done
with public `EnableNotarySupport` method separately.
Notary availability is deducted with client. Further,
if notary is presented on chain its support is
enabled at the corresponding client.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add initialization of `updateInnerRing` method name
in config on startup.
Rename var `setInnerRing` => `updateInnerRing`.
Rename method `SetInnerRing` => `UpdateInnerRing`
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add `netmapCandidates` method to `netmap` client
wrapper. Method parses node storages candidates
for the next epoch.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
The only thing we need hashes for is to process notifications.
Balance contract if left for now, as it has some initialization.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Test invocations are used in `Invoke` method to calculate
consumed gas. We can check return code and return error
if panic happened in contract.
This is already done the same way in `TestInvoke` method.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Pass `TryNotary()` option to constructor of the static client of the NeoFS
ID contract in `NewFromMorph`. This will allow to use client wrapper for key
management in IR application.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Morph event structures defined in `pkg/morph/event` should only carry
notification values without any additional interpretation. All logical work
should be concentrated on app-side. Change `Bind.User` / `Unbind.User` to
return byte slice. Change `Bind.Keys` / `Unbind.Keys` to return `[][]byte`.
`ParseBind` / `ParseUnbind` don't decode data from now.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement method `ClientWrapper.ManageKeys` method which provides the
interface to add/remove keys to/from NeoFS account.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement `AddKeys` / `RemoveKeys` methods to call `addKey` / `removeKey`
methods of NeoFS ID contract.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement wrapper over NeoFS contact's client which allows you to
conveniently interact with the contract. Implement `ManageKeys` method
for binding or unbinding public keys to the NeoFS account.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement NeoFS contact's client which is responsible for collecting call
arguments and parsing stack items. Initially key binding and unbinding are
supported.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`bindKey` parameter of `Put` method of `Container` contract was removed in
latest version.
Do not pass bind key of type `[]byte` to `Put` invocation. Remove no longer
needed field from `PutArgs`.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`Delete` method of latest `Container` contract accepts binary session token
as an argument.
Provide `DeleteArgs.SetSessionToken` method. Accept session token as a
`[]byte` in `Wrapper.Put` method and attach it to `PutArgs`. Marshal session
token from `RemovalWitness` in `wrapper.Delete` function and pass it to the
method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
The 3rd item of `Delete` container notification event is a byte array of
serialized session token. Parse session token in `ParseDelete` function.
Provide `Delete.SessionToken` method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `wrapper.Delete` function to accept `container.RemovalWitness` struct
instead of its separated elements. `Signature` type is replaced by binary
signature since public key is unused.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Unmarshal session token from `EACLValues` and write it to resulting
`eacl.Table` structure in `Wrapper.GetEACL` method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`EACL` method of `Container` contract returns binary session token, key and
signature along with eACL table.
Provide `Signature`, `PublicKey` and `SessionToken` getters from
`EACLValues` structure. Parse and set all values in `Client.EACL` methods.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
The 4th item of `SetEACL` container notification event is a byte array of
serialized session token.
Parse session token in `ParseSetEACL` function. Provide
`SetEACL.SessionToken` method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`SetEACL` method of latest `Container` contract accepts binary session token
as an argument.
Provide `SetEACLArgs.SetSessionToken` method. Accept session token as a
`[]byte` in `Wrapper.PutEACL` method and attach it to `SetEACLArgs`. Marshal
session token from container in `wrapper.PutEACL` function and pass it to
the method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Unmarshal session token from `GetValues` and write it to resulting
`Container` structure in `Wrapper.Get` method. Write key-signature pair from
`GetValues` to resulting `Container` structure in `Wrapper.Get` method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`Get` method of `Container` contract returns binary session token, key and
signature along with container.
Provide `Signature`, `PublicKey` and `SessionToken` getters from `GetValues`
structure. Parse and set all values in `Client.Get` methods.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
The 4th item of `Put` container notification event is a byte array of
serialized session token.
Parse session token in `ParsePut` function. Provide `Put.SessionToken`
method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`Put` method of latest `Container` contract accepts binary session token as
an argument.
Provide `PutArgs.SetSessionToken` method. Accept session token as a `[]byte`
in `Wrapper.Put` method and attach it to `PutArgs`. Marshal session token
from container in `wrapper.Put` function and pass it to the method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation wrapper over the Container contract's client
accepted the signature of the eACL table in addition to itself. After recent
changes in API Go lib table carries its signature. Thus, it is redundant
to pass the eACL table signature separately.
Make `wrapper.PutEACL` method to accept `eacl.Table` only.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation wrapper over the Container contract's client
accepted the signature of the container in addition to itself. After recent
changes in API Go lib container carries its signature. Thus, it is redundant
to pass the container signature separately.
Make `wrapper.Put` method to accept `Container` only.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In previous implementation wrapper over the Container contract's client
returned the signature of the eACL table in addition to itself. After recent
changes in API Go lib table carries its signature. Thus, it is redundant to
return the table signature separately.
Make `Wrapper.GetEACL` method to return only `eacl.Table` with error.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`eACL` method of `Container` contract returns structure with 4 fields (the
4th is a recently added binary session token).
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Change expected event items to 4 in order to support new binary session
token item. Parsing of the session token will be implemented later.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
All client wrappers should use underlying static client with enabled notary
work mode in order to produce invocations of notary contract.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Some of the client wrapper's methods should produce notary contract's
invocations. In previous implementation all wrappers provided separate
methods to do it. Since notary and non-notary invocation scenarios have very
different goals, it makes sense to separate the scenarios of using the
client wrapper at the stage of its creation.
Define `Option` constructor for container client wrapper. Add `TryNotary`
option which enables tries of the notary invocations on underlying static
client. Mark all notary-dedicated methods as deprecated.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
There are two scenarios of invocation of contract methods:
1. do not invoke notary contract;
2. try to invoke notary contract if it is enabled in Client.
Taking this into account, `StaticClient` can work in one of the two described
modes. Based on this, it makes sense at the stage of creating `StaticClient`
to fix the call mode, and the further abstract from it.
Define `StaticClientOption` setters of `StaticClient` optional parameters.
Add `TryNotary` constructor of option which enables notary tries. Call
`NotaryInvoke` on underlying `Client` if the option is provided, otherwise
call `Invoke`. Mark `NotaryInvoke` method of `StaticClient` as deprecated.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Pass session token (byte array) and bind key flag (boolean) arguments to
`Put` method call of `Container` contract.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Change expected event items to 4 in order to support new binary session
token item. Parsing of the session token will be implemented later.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `Get` method of the wrapper over Container contract's client to
accept binary container ID. Create `Get` function similar to the previous
`Get` variation. Use this function in Container service server in the place
where `Get` method was used.
Additionally implement `AsContainerSource` function which allows
to simply compose container Source interface from the wrapper.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `Delete` method of the wrapper over Container contract's client to accept
two binary parameters: container ID and signature. Create `Delete` function
similar to the previous `Delete` variation, but accepting `Signature`
structure instead of binary signature. Use this function in Container
service server in the place where `Delete` method was used.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
`Put` method of the wrapper over the Container contract's client does not
modify passed binary container, so it makes no sense to calculate the
identifier.
`Put` method returns the error only from now. Function `Put` calculates
identifier itself since it is still required by function signature.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Make `Put` method of the wrapper over Container contract's client to accept
three binary parameters: container, key and signature. Create `Put` function
similar to the previous `Put` variation, but accepting `Signature`
structure instead of binary key and signature. Use this function in
Container service server in the place where `Put` method was used.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Morph event structures defined in `pkg/morph/event` should only carry
notification values without any additional interpretation. All logical work
should be concentrated on app-side.
Change data type of `Put.PublicKey` return to byte slice. `ParsePut` doesn't
unmarshal public key from now.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add `setEACL` notification event parser (handler) to the return of the
`ListenerParsers` (`ListenerHandlers`) method. Read address of NeoFS ID
contract from `contracts.neofsid` config. Implement `NewNeoFSIDClient`
constructor in `invoke` package and use it in IR application.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Define `SetEACL` structure of eACL table change notification from Container
contract. Implement function which parses `SetEACL` event structure from
stack item list.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
In recent changes argument list of set eACL call of Container contract
client was extended with binary public key. In the future there will be a
need to pass the table in binary format.
Replace `PutEACL` method with `PutEACLBinary` one which accepts three binary
parameters: eACL table, key and signature. Create `PutEACL` function similar
to the removed method, but accepting `Signature` structure instead of just
a signature. Use this function in Container service server in the place
where `PutEACL` was used.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Add `SetEACLArgs.SetPublicKey` method which sets binary public key argument
of the "set eACL" contract call. Attach key to the `Invoke` call.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement wrapper over NeoFS ID contact's client which allows to which
allows you to conveniently interact with the contract. Implement
`AccountKeys` method for getting a list of keys by account ID.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement NeoFS ID contact's client which is responsible for collecting call
arguments and parsing stack items. Initially only key listing method is
supported.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Including:
- typo fix for `StringFromStackItem` error msg
- EigenTrust alpha getter.
- renaming local var in reading uin64 values
from global cfg function
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
To enable notary support in main chain, notary subsystem should not get
alphabet keys from (main chain) committee. This key fetcher is now
separated and may be overwritten by `WithAlphabetSource` option.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
With neo-go v0.94.1 verification fee can be calculated
precisely and alphabet keys are fetched from committee
instead of network map contract.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Neo node can return integers values where []byte is expected.
To cover such cases, try to parse integers in `BytesFromStackItem`.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Add handler closure over worker pool
in the event package.
Add `addNewEpochAsyncNotificationHandler`
function that uses that closure. Pass
the reputation report handler to worker
pool via using that function.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
Add checking if returned error contains
"already on chain" substring. Do not
consider that behavior to be erroneous.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
If non-"HALT" `State` occurs after
calling `InvokeFunction` NeoGo client
method, add `FaultException` information
to returning error. Add returning state
check to `NotaryInvoke` method of the
morph/client.
Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
New neo-go version provides:
- new type for roles in `RoleManagement` contract,
- methods to get keys from `RoleManagement` contract,
- new way to sign notary transaction.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
RoleManagement native contract (ex designate contract) stores list
of keys per role. Main net uses NeoFSAlphabet role to store keys of
alphabet nodes of inner ring. Side chain uses the same role to store
keys of all inner ring nodes, including alphabet.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
