frostfs-node/pkg/morph/event/container/delete.go
Leonard Lyubich 7c1babb7d6 [#1632] node: Subscribe on the successful container creations/removals
There is a need to sync container-related caching mechanism with the
actual Sidechain changes. To do this, node should be able to listen
incoming notifications about container ops.

Define `PutSuccess` / `DeleteSuccess` notification event's parsers.
Subscribe to these events in node app. As initial implementation node
will log event receipts. Later handling is going to be practically
complicated.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
2022-09-02 11:29:55 +04:00

123 lines
3.3 KiB
Go

package container
import (
"fmt"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/network/payload"
"github.com/nspcc-dev/neofs-node/pkg/morph/client"
"github.com/nspcc-dev/neofs-node/pkg/morph/event"
cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
)
// Delete structure of container.Delete notification from morph chain.
type Delete struct {
containerID []byte
signature []byte
token []byte
// For notary notifications only.
// Contains raw transactions of notary request.
notaryRequest *payload.P2PNotaryRequest
}
// MorphEvent implements Neo:Morph Event interface.
func (Delete) MorphEvent() {}
// ContainerID is a marshalled container structure, defined in API.
func (d Delete) ContainerID() []byte { return d.containerID }
// Signature of marshalled container by container owner.
func (d Delete) Signature() []byte { return d.signature }
// SessionToken returns binary token of the session
// within which the eACL was set.
func (d Delete) SessionToken() []byte {
return d.token
}
// NotaryRequest returns raw notary request if notification
// was received via notary service. Otherwise, returns nil.
func (d Delete) NotaryRequest() *payload.P2PNotaryRequest {
return d.notaryRequest
}
const expectedItemNumDelete = 3
// ParseDelete from notification into container event structure.
//
// Expects 3 stack items.
func ParseDelete(e *state.ContainedNotificationEvent) (event.Event, error) {
var (
ev Delete
err error
)
params, err := event.ParseStackArray(e)
if err != nil {
return nil, fmt.Errorf("could not parse stack items from notify event: %w", err)
}
if ln := len(params); ln != expectedItemNumDelete {
return nil, event.WrongNumberOfParameters(expectedItemNumDelete, ln)
}
// parse container
ev.containerID, err = client.BytesFromStackItem(params[0])
if err != nil {
return nil, fmt.Errorf("could not get container: %w", err)
}
// parse signature
ev.signature, err = client.BytesFromStackItem(params[1])
if err != nil {
return nil, fmt.Errorf("could not get signature: %w", err)
}
// parse session token
ev.token, err = client.BytesFromStackItem(params[2])
if err != nil {
return nil, fmt.Errorf("could not get session token: %w", err)
}
return ev, nil
}
// DeleteSuccess structures notification event of successful container removal
// thrown by Container contract.
type DeleteSuccess struct {
// Identifier of the removed container.
ID cid.ID
}
// MorphEvent implements Neo:Morph Event interface.
func (DeleteSuccess) MorphEvent() {}
// ParseDeleteSuccess decodes notification event thrown by Container contract into
// DeleteSuccess and returns it as event.Event.
func ParseDeleteSuccess(e *state.ContainedNotificationEvent) (event.Event, error) {
items, err := event.ParseStackArray(e)
if err != nil {
return nil, fmt.Errorf("parse stack array from raw notification event: %w", err)
}
const expectedItemNumDeleteSuccess = 1
if ln := len(items); ln != expectedItemNumDeleteSuccess {
return nil, event.WrongNumberOfParameters(expectedItemNumDeleteSuccess, ln)
}
binID, err := client.BytesFromStackItem(items[0])
if err != nil {
return nil, fmt.Errorf("parse container ID item: %w", err)
}
var res DeleteSuccess
err = res.ID.Decode(binID)
if err != nil {
return nil, fmt.Errorf("decode container ID: %w", err)
}
return res, nil
}