frostfs-node/pkg/innerring/processors/subnet/put.go
Leonard Lyubich 2e4a1cb6df [#1518] Upgrade NeoFS SDK Go with changed subnet package
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
2022-06-15 17:02:49 +03:00

82 lines
2.1 KiB
Go

package subnetevents
import (
"errors"
"fmt"
"github.com/nspcc-dev/neofs-sdk-go/subnet"
subnetid "github.com/nspcc-dev/neofs-sdk-go/subnet/id"
"github.com/nspcc-dev/neofs-sdk-go/user"
)
// Put represents a notification about NeoFS subnet creation.
// Generated by a contract when intending to create a subnet.
type Put interface {
// Contains the ID of the subnet to be created.
eventWithID
// ReadCreator reads the user ID of the subnet creator.
// Returns an error if the ID is missing.
ReadCreator(id *user.ID) error
// ReadInfo reads information about a subnet to be created.
ReadInfo(info *subnet.Info) error
}
// PutValidator asserts intent to create a subnet.
type PutValidator struct{}
// errDiffOwner is returned when the subnet owners differ.
var errDiffOwner = errors.New("diff subnet owners")
// errDiffID is returned when the subnet IDs differ.
var errDiffID = errors.New("diff subnet IDs")
// Assert processes the attempt to create a subnet. It approves the creation through nil return.
//
// All read errors of Put are forwarded.
//
// It returns an error on:
// * zero subnet creation;
// * empty ID or different from the one wired into info;
// * empty owner ID or different from the one wired into info.
func (x PutValidator) Assert(event Put) error {
var err error
// read ID
var id subnetid.ID
if err = event.ReadID(&id); err != nil {
return fmt.Errorf("read ID: %w", err)
}
// prevent zero subnet creation
if subnetid.IsZero(id) {
return zeroSubnetOp{
op: "creation",
}
}
// read creator's user ID in NeoFS system
var creator user.ID
if err = event.ReadCreator(&creator); err != nil {
return fmt.Errorf("read creator: %w", err)
}
// read information about the subnet
var info subnet.Info
if err = event.ReadInfo(&info); err != nil {
return fmt.Errorf("read info: %w", err)
}
// check if the explicit ID equals to the one from info
if !subnet.AssertReference(info, id) {
return errDiffID
}
// check if the explicit creator equals to the one from info
if !subnet.AssertOwnership(info, creator) {
return errDiffOwner
}
return nil
}