forked from raedahgroup/vspd
/
stakepooldclient.go
57 lines (47 loc) · 1.64 KB
/
stakepooldclient.go
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package stakepooldclient
import (
"fmt"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
pb "github.com/decred/dcrstakepool/backend/stakepoold/rpc/stakepoolrpc"
"golang.org/x/net/context"
)
var requiredStakepooldAPI = semver{major: 3, minor: 0, patch: 0}
func ConnectStakepooldGRPC(stakepooldHosts []string, stakepooldCerts []string, serverID int) (*grpc.ClientConn, error) {
log.Infof("Attempting to connect to stakepoold gRPC %s using "+
"certificate located in %s", stakepooldHosts[serverID],
stakepooldCerts[serverID])
creds, err := credentials.NewClientTLSFromFile(stakepooldCerts[serverID], "localhost")
if err != nil {
return nil, err
}
conn, err := grpc.Dial(stakepooldHosts[serverID], grpc.WithTransportCredentials(creds))
if err != nil {
return nil, err
}
c := pb.NewVersionServiceClient(conn)
versionRequest := &pb.VersionRequest{}
versionResponse, err := c.Version(context.Background(), versionRequest)
if err != nil {
return nil, err
}
var semverResponse = semver{
major: versionResponse.Major,
minor: versionResponse.Minor,
patch: versionResponse.Patch,
}
if !semverCompatible(requiredStakepooldAPI, semverResponse) {
return nil, fmt.Errorf("Stakepoold gRPC server does not have "+
"a compatible API version. Advertises %v but require %v",
versionResponse, requiredStakepooldAPI)
}
return conn, nil
}
func StakepooldUpdateVotingPrefs(conn *grpc.ClientConn, userid int64) error {
c := pb.NewStakepooldServiceClient(conn)
updateVotingPrefsRequest := &pb.UpdateVotingPrefsRequest{
Userid: userid,
}
_, err := c.UpdateVotingPrefs(context.Background(), updateVotingPrefsRequest)
return err
}