Move to frostfs-node

Signed-off-by: Pavel Karpy <p.karpy@yadro.com>

cmd/frostfs-cli/internal/client/sdk.go

@@ -0,0 +1,95 @@
+package internal
+
+import (
+	"context"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"errors"
+	"fmt"
+
+	"github.com/TrueCloudLab/frostfs-node/cmd/frostfs-cli/internal/common"
+	"github.com/TrueCloudLab/frostfs-node/cmd/frostfs-cli/internal/commonflags"
+	"github.com/TrueCloudLab/frostfs-node/pkg/network"
+	"github.com/TrueCloudLab/frostfs-sdk-go/client"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var errInvalidEndpoint = errors.New("provided RPC endpoint is incorrect")
+
+// GetSDKClientByFlag returns default frostfs-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 frostfs-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())
+	if timeout := viper.GetDuration(commonflags.Timeout); timeout > 0 {
+		// In CLI we can only set a timeout for the whole operation.
+		// By also setting stream timeout we ensure that no operation hands
+		// for too long.
+		prmDial.SetTimeout(timeout)
+		prmDial.SetStreamTimeout(timeout)
+
+		common.PrintVerbose("Set request timeout to %s.", timeout)
+	}
+
+	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(ctx context.Context, 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
+	}
+
+	ni, err := c.NetworkInfo(ctx, client.PrmNetworkInfo{})
+	if err != nil {
+		return 0, err
+	}
+
+	return ni.Info().CurrentEpoch(), nil
+}