frostfs-node/pkg/morph/event/netmap/epoch.go

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package netmap
import (
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/util"
)
// NewEpoch is a new epoch Neo:Morph event.
type NewEpoch struct {
num uint64
// txHash is used in notary environmental
// for calculating unique but same for
// all notification receivers values.
txHash util.Uint256
}
// MorphEvent implements Neo:Morph Event interface.
func (NewEpoch) MorphEvent() {}
// EpochNumber returns new epoch number.
func (s NewEpoch) EpochNumber() uint64 {
return s.num
}
// TxHash returns hash of the TX with new epoch
// notification.
func (s NewEpoch) TxHash() util.Uint256 {
return s.txHash
}
// ParseNewEpoch is a parser of new epoch notification event.
//
// Result is type of NewEpoch.
func ParseNewEpoch(e *state.ContainedNotificationEvent) (event.Event, 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 != 1 {
return nil, event.WrongNumberOfParameters(1, ln)
}
prmEpochNum, err := client.IntFromStackItem(params[0])
if err != nil {
return nil, fmt.Errorf("could not get integer epoch number: %w", err)
}
return NewEpoch{
num: uint64(prmEpochNum),
txHash: e.Container,
}, nil
}