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stakepooldclient.go
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stakepooldclient.go
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package stakepooldclient
import (
"fmt"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"github.com/EXCCoin/exccd/chaincfg/chainhash"
pb "github.com/EXCCoin/exccstakepool/backend/stakepoold/rpc/stakepoolrpc"
"github.com/EXCCoin/exccstakepool/models"
"golang.org/x/net/context"
)
var requiredStakepooldAPI = semver{major: 4, 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)
}
log.Infof("Established connection to gRPC server %s",
stakepooldHosts[serverID])
return conn, nil
}
func StakepooldGetAddedLowFeeTickets(conn *grpc.ClientConn) (map[chainhash.Hash]string, error) {
addedLowFeeTickets := make(map[chainhash.Hash]string)
client := pb.NewStakepooldServiceClient(conn)
resp, err := client.GetAddedLowFeeTickets(context.Background(), &pb.GetAddedLowFeeTicketsRequest{})
// return early if the list is empty
if resp == nil || err != nil {
return addedLowFeeTickets, err
}
for _, ticketData := range resp.Tickets {
hash, err := chainhash.NewHash(ticketData.TicketHash)
if err != nil {
log.Warnf("NewHash failed for %v: %v", ticketData.TicketHash, err)
continue
}
addedLowFeeTickets[*hash] = ticketData.TicketAddress
}
return addedLowFeeTickets, err
}
func StakepooldGetIgnoredLowFeeTickets(conn *grpc.ClientConn) (map[chainhash.Hash]string, error) {
ignoredLowFeeTickets := make(map[chainhash.Hash]string)
client := pb.NewStakepooldServiceClient(conn)
resp, err := client.GetIgnoredLowFeeTickets(context.Background(), &pb.GetIgnoredLowFeeTicketsRequest{})
// return early if the list is empty
if resp == nil || err != nil {
return ignoredLowFeeTickets, err
}
for _, ticketData := range resp.Tickets {
hash, err := chainhash.NewHash(ticketData.TicketHash)
if err != nil {
log.Warnf("NewHash failed for %v: %v", ticketData.TicketHash, err)
continue
}
ignoredLowFeeTickets[*hash] = ticketData.TicketAddress
}
return ignoredLowFeeTickets, err
}
func StakepooldGetLiveTickets(conn *grpc.ClientConn) (map[chainhash.Hash]string, error) {
liveTickets := make(map[chainhash.Hash]string)
client := pb.NewStakepooldServiceClient(conn)
resp, err := client.GetLiveTickets(context.Background(), &pb.GetLiveTicketsRequest{})
// return early if the list is empty
if resp == nil || err != nil {
return liveTickets, err
}
for _, ticketData := range resp.Tickets {
hash, err := chainhash.NewHash(ticketData.TicketHash)
if err != nil {
log.Warnf("NewHash failed for %v: %v", ticketData.TicketHash, err)
continue
}
liveTickets[*hash] = ticketData.TicketAddress
}
return liveTickets, err
}
func StakepooldSetAddedLowFeeTickets(conn *grpc.ClientConn, dbTickets []models.LowFeeTicket) (processed bool, err error) {
var tickets []*pb.TicketEntry
for _, ticket := range dbTickets {
hash, err := chainhash.NewHashFromStr(ticket.TicketHash)
if err != nil {
log.Warnf("NewHashFromStr failed for %v: %v", ticket.TicketHash, err)
continue
}
tickets = append(tickets, &pb.TicketEntry{
TicketAddress: ticket.TicketAddress,
TicketHash: hash.CloneBytes(),
})
}
client := pb.NewStakepooldServiceClient(conn)
setAddedTicketsReq := &pb.SetAddedLowFeeTicketsRequest{
Tickets: tickets,
}
_, err = client.SetAddedLowFeeTickets(context.Background(),
setAddedTicketsReq)
if err != nil {
return false, err
}
return true, err
}
func StakepooldSetUserVotingPrefs(conn *grpc.ClientConn, dbUsers map[int64]*models.User) (processed bool, err error) {
var users []*pb.UserVotingConfigEntry
for userid, data := range dbUsers {
users = append(users, &pb.UserVotingConfigEntry{
UserId: userid,
MultiSigAddress: data.MultiSigAddress,
VoteBits: data.VoteBits,
VoteBitsVersion: data.VoteBitsVersion,
})
}
client := pb.NewStakepooldServiceClient(conn)
setVotingConfigReq := &pb.SetUserVotingPrefsRequest{
UserVotingConfig: users,
}
_, err = client.SetUserVotingPrefs(context.Background(),
setVotingConfigReq)
if err != nil {
return false, err
}
return true, err
}