frostfs-api-go/pkg/client/netmap.go

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package client
import (
"context"
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
"github.com/nspcc-dev/neofs-api-go/v2/client"
v2netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap"
v2signature "github.com/nspcc-dev/neofs-api-go/v2/signature"
"github.com/pkg/errors"
)
// EndpointInfo returns attributes, address and public key of the node, specified
// in client constructor via address or open connection. This can be used as a
// health check to see if node is alive and responses to requests.
func (c Client) EndpointInfo(ctx context.Context, opts ...CallOption) (*netmap.NodeInfo, error) {
switch c.remoteNode.Version.GetMajor() {
case 2:
resp, err := c.endpointInfoV2(ctx, opts...)
if err != nil {
return nil, err
}
return netmap.NewNodeInfoFromV2(resp.GetBody().GetNodeInfo()), nil
default:
return nil, unsupportedProtocolErr
}
}
// Epoch returns the epoch number from the local state of the remote host.
func (c Client) Epoch(ctx context.Context, opts ...CallOption) (uint64, error) {
switch c.remoteNode.Version.GetMajor() {
case 2:
resp, err := c.endpointInfoV2(ctx, opts...)
if err != nil {
return 0, err
}
return resp.GetMetaHeader().GetEpoch(), nil
default:
return 0, unsupportedProtocolErr
}
}
func (c Client) endpointInfoV2(ctx context.Context, opts ...CallOption) (*v2netmap.LocalNodeInfoResponse, error) {
// apply all available options
callOptions := c.defaultCallOptions()
for i := range opts {
opts[i].apply(&callOptions)
}
reqBody := new(v2netmap.LocalNodeInfoRequestBody)
req := new(v2netmap.LocalNodeInfoRequest)
req.SetBody(reqBody)
req.SetMetaHeader(v2MetaHeaderFromOpts(callOptions))
err := v2signature.SignServiceMessage(c.key, req)
if err != nil {
return nil, err
}
switch c.remoteNode.Protocol {
case GRPC:
cli, err := v2NetmapClientFromOptions(c.opts)
if err != nil {
return nil, errors.Wrap(err, "can't create grpc client")
}
resp, err := cli.LocalNodeInfo(ctx, req)
if err != nil {
return nil, errors.Wrap(err, "transport error")
}
err = v2signature.VerifyServiceMessage(resp)
if err != nil {
return nil, errors.Wrap(err, "can't verify response message")
}
return resp, nil
default:
return nil, unsupportedProtocolErr
}
}
func v2NetmapClientFromOptions(opts *clientOptions) (cli *v2netmap.Client, err error) {
switch {
case opts.grpcOpts.v2NetmapClient != nil:
// return value from client cache
return opts.grpcOpts.v2NetmapClient, nil
case opts.grpcOpts.conn != nil:
cli, err = v2netmap.NewClient(v2netmap.WithGlobalOpts(
client.WithGRPCConn(opts.grpcOpts.conn)),
)
case opts.addr != "":
cli, err = v2netmap.NewClient(v2netmap.WithGlobalOpts(
client.WithNetworkAddress(opts.addr)),
)
default:
return nil, errors.New("lack of sdk client options to create accounting client")
}
// check if client correct and save in cache
if err != nil {
return nil, err
}
opts.grpcOpts.v2NetmapClient = cli
return cli, nil
}