36 lines
1.1 KiB
Go
36 lines
1.1 KiB
Go
|
package netmap
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
|
||
|
|
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Source is an interface that wraps
|
||
|
|
// basic network map receiving method.
|
||
|
|
type Source interface {
|
||
|
|
// GetNetMap reads the diff-th past network map from the storage.
|
||
|
|
// Calling with zero diff returns latest network map.
|
||
|
|
// It returns the pointer to requested network map and any error encountered.
|
||
|
|
//
|
||
|
|
// GetNetMap must return exactly one non-nil value.
|
||
|
|
// GetNetMap must return ErrNotFound if the network map is not in storage.
|
||
|
|
//
|
||
|
|
// Implementations must not retain the network map pointer and modify
|
||
|
|
// the network map through it.
|
||
|
|
GetNetMap(diff uint64) (*netmap.Netmap, error)
|
||
|
|
}
|
||
|
|
|
||
|
|
// ErrNotFound is the error returned when network map was not found in storage.
|
||
|
|
var ErrNotFound = errors.New("network map not found")
|
||
|
|
|
||
|
|
// GetLatestNetworkMap requests and returns latest network map from storage.
|
||
|
|
func GetLatestNetworkMap(src Source) (*netmap.Netmap, error) {
|
||
|
|
return src.GetNetMap(0)
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetPreviousNetworkMap requests and returns previous from latest network map from storage.
|
||
|
|
func GetPreviousNetworkMap(src Source) (*netmap.Netmap, error) {
|
||
|
|
return src.GetNetMap(1)
|
||
|
|
}
|