frostfs-node/pkg/services/container/announcement/load/route/util.go

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package loadroute
import (
"bytes"
"errors"
"github.com/nspcc-dev/neofs-sdk-go/container"
)
var errWrongRoute = errors.New("wrong route")
// CheckRoute checks if the route is a route correctly constructed by the builder for value a.
//
// Returns nil if route is correct, otherwise an error clarifying the inconsistency.
func CheckRoute(builder Builder, a container.SizeEstimation, route []ServerInfo) error {
for i := 1; i < len(route); i++ {
servers, err := builder.NextStage(a, route[:i])
if err != nil {
return err
} else if len(servers) == 0 {
break
}
found := false
for j := range servers {
if servers[j] == nil {
// nil route point means that
// (i-1)-th node in the route
// must, among other things,
// save the announcement to its
// local memory
continue
}
if bytes.Equal(servers[j].PublicKey(), route[i].PublicKey()) {
found = true
break
}
}
if !found {
return errWrongRoute
}
}
return nil
}