frostfs-node/pkg/morph/event/subnet/delete.go

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package subnetevents
import (
"fmt"
"github.com/nspcc-dev/neo-go/pkg/network/payload"
"github.com/nspcc-dev/neo-go/pkg/rpc/response/result/subscriptions"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neofs-node/pkg/morph/client"
"github.com/nspcc-dev/neofs-node/pkg/morph/event"
)
// Delete structures information about the notification generated by Delete method of Subnet contract.
type Delete struct {
notaryRequest *payload.P2PNotaryRequest
txHash util.Uint256
id []byte
}
// MorphEvent implements Neo:Morph Event interface.
func (Delete) MorphEvent() {}
// ID returns identifier of the removed subnet in a binary format of NeoFS API protocol.
func (x Delete) ID() []byte {
return x.id
}
// TxHash returns hash of the transaction which thrown the notification event.
// Makes sense only in non-notary environments (see NotaryMainTx).
func (x Delete) TxHash() util.Uint256 {
return x.txHash
}
// ParseDelete parses the notification about the removal of a subnet which has been thrown
// by the appropriate method of the Subnet contract.
//
// Resulting event is of Delete type.
func ParseDelete(e *subscriptions.NotificationEvent) (event.Event, error) {
var (
ev Delete
err error
)
items, err := event.ParseStackArray(e)
if err != nil {
return nil, fmt.Errorf("parse stack array: %w", err)
}
const itemNumDelete = 1
if ln := len(items); ln != itemNumDelete {
return nil, event.WrongNumberOfParameters(itemNumDelete, ln)
}
// parse ID
ev.id, err = client.BytesFromStackItem(items[0])
if err != nil {
return nil, fmt.Errorf("id item: %w", err)
}
ev.txHash = e.Container
return ev, nil
}