[#22] Update system attributes prefix

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

utils/util.go

@@ -2,9 +2,11 @@ package utils
 
 import (
 	"context"
+	"fmt"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
 )
 
 // GetContainerID decode container id, if it's not a valid container id
@@ -17,3 +19,27 @@ func GetContainerID(ctx context.Context, containerID string, resolver *resolver.
 	}
 	return cnrID, err
 }
+
+type EpochDurations struct {
+	CurrentEpoch  uint64
+	MsPerBlock    int64
+	BlockPerEpoch uint64
+}
+
+func GetEpochDurations(ctx context.Context, p *pool.Pool) (*EpochDurations, error) {
+	networkInfo, err := p.NetworkInfo(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	res := &EpochDurations{
+		CurrentEpoch:  networkInfo.CurrentEpoch(),
+		MsPerBlock:    networkInfo.MsPerBlock(),
+		BlockPerEpoch: networkInfo.EpochDuration(),
+	}
+
+	if res.BlockPerEpoch == 0 {
+		return nil, fmt.Errorf("EpochDuration is empty")
+	}
+	return res, nil
+}