// startChainRPC opens a RPC client connection to a dtcd server for blockchain
// services. This function uses the RPC options from the global config and
// there is no recovery in case the server is not available or if there is an
// authentication error. Instead, all requests to the client will simply error.
func startChainRPC(certs []byte) (*chain.RPCClient, error) {
log.Infof("Attempting RPC client connection to %v", cfg.RPCConnect)
rpcc, err := chain.NewRPCClient(activeNet.Params, cfg.RPCConnect,
cfg.DcrdUsername, cfg.DcrdPassword, certs, cfg.DisableClientTLS, 0)
if err != nil {
return nil, err
}
err = rpcc.Start()
return rpcc, err
}
func (s *loaderServer) StartConsensusRpc(ctx context.Context, req *pb.StartConsensusRpcRequest) (
*pb.StartConsensusRpcResponse, error) {
defer zero.Bytes(req.Password)
defer s.mu.Unlock()
s.mu.Lock()
if s.rpcClient != nil {
return nil, grpc.Errorf(codes.FailedPrecondition, "RPC client already created")
}
networkAddress, err := cfgutil.NormalizeAddress(req.NetworkAddress,
s.activeNet.RPCClientPort)
if err != nil {
return nil, grpc.Errorf(codes.InvalidArgument,
"Network address is ill-formed: %v", err)
}
// Error if the wallet is already syncing with the network.
wallet, walletLoaded := s.loader.LoadedWallet()
if walletLoaded && wallet.SynchronizingToNetwork() {
return nil, grpc.Errorf(codes.FailedPrecondition,
"wallet is loaded and already synchronizing")
}
rpcClient, err := chain.NewRPCClient(s.activeNet.Params, networkAddress, req.Username,
string(req.Password), req.Certificate, len(req.Certificate) == 0, 1)
if err != nil {
return nil, translateError(err)
}
err = rpcClient.Start()
if err != nil {
if err == dcrrpcclient.ErrInvalidAuth {
return nil, grpc.Errorf(codes.InvalidArgument,
"Invalid RPC credentials: %v", err)
}
return nil, grpc.Errorf(codes.NotFound,
"Connection to RPC server failed: %v", err)
}
s.rpcClient = rpcClient
if walletLoaded {
wallet.SynchronizeRPC(rpcClient)
}
return &pb.StartConsensusRpcResponse{}, nil
}