package internal import ( "context" "crypto/ecdsa" "crypto/elliptic" "crypto/rand" "errors" "fmt" "time" "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common" "github.com/nspcc-dev/neofs-node/pkg/network" "github.com/nspcc-dev/neofs-sdk-go/client" "github.com/spf13/cobra" "github.com/spf13/viper" ) var errInvalidEndpoint = errors.New("provided RPC endpoint is incorrect") // GetSDKClientByFlag returns default neofs-sdk-go client using the specified flag for the address. // On error, outputs to stderr of cmd and exits with non-zero code. func GetSDKClientByFlag(cmd *cobra.Command, key *ecdsa.PrivateKey, endpointFlag string) *client.Client { cli, err := getSDKClientByFlag(key, endpointFlag) if err != nil { common.ExitOnErr(cmd, "can't create API client: %w", err) } return cli } func getSDKClientByFlag(key *ecdsa.PrivateKey, endpointFlag string) (*client.Client, error) { var addr network.Address err := addr.FromString(viper.GetString(endpointFlag)) if err != nil { return nil, fmt.Errorf("%v: %w", errInvalidEndpoint, err) } return GetSDKClient(key, addr) } // GetSDKClient returns default neofs-sdk-go client. func GetSDKClient(key *ecdsa.PrivateKey, addr network.Address) (*client.Client, error) { var ( c client.Client prmInit client.PrmInit prmDial client.PrmDial ) prmInit.SetDefaultPrivateKey(*key) prmInit.ResolveNeoFSFailures() prmDial.SetServerURI(addr.URIAddr()) c.Init(prmInit) if err := c.Dial(prmDial); err != nil { return nil, fmt.Errorf("can't init SDK client: %w", err) } return &c, nil } // GetCurrentEpoch returns current epoch. func GetCurrentEpoch(endpoint string) (uint64, error) { var addr network.Address if err := addr.FromString(endpoint); err != nil { return 0, fmt.Errorf("can't parse RPC endpoint: %w", err) } key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader) if err != nil { return 0, fmt.Errorf("can't generate key to sign query: %w", err) } c, err := GetSDKClient(key, addr) if err != nil { return 0, err } ctx, cancel := context.WithTimeout(context.Background(), time.Second*30) defer cancel() ni, err := c.NetworkInfo(ctx, client.PrmNetworkInfo{}) if err != nil { return 0, err } return ni.Info().CurrentEpoch(), nil }