command for serving data without an ongoing sync process

cmd/screenAndServe.go

@@ -0,0 +1,124 @@
+// Copyright © 2019 Vulcanize, Inc
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+	"os"
+	"path/filepath"
+	syn "sync"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/rpc"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"github.com/vulcanize/vulcanizedb/pkg/config"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/ipfs"
+	"github.com/vulcanize/vulcanizedb/pkg/super_node"
+	"github.com/vulcanize/vulcanizedb/utils"
+)
+
+// screenAndServeCmd represents the screenAndServe command
+var screenAndServeCmd = &cobra.Command{
+	Use:   "screenAndServe",
+	Short: "Serve super-node data requests to requesting clients",
+	Long: ` It then opens up WS and IPC servers on top of the super-node ETH-IPLD index which 
+relays relevant data to requesting clients. In this mode, the super-node can only relay data which it has
+already indexed it does not stream out live data.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		screenAndServe()
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(screenAndServeCmd)
+}
+
+func screenAndServe() {
+	superNode, newNodeErr := newSuperNodeWithoutPairedGethNode()
+	if newNodeErr != nil {
+		log.Fatal(newNodeErr)
+	}
+	wg := &syn.WaitGroup{}
+	quitChan := make(chan bool, 1)
+	emptyPayloadChan := make(chan ipfs.IPLDPayload)
+	superNode.ScreenAndServe(wg, emptyPayloadChan, quitChan)
+
+	serverErr := startServers(superNode)
+	if serverErr != nil {
+		log.Fatal(serverErr)
+	}
+	wg.Wait()
+}
+
+func startServers(superNode super_node.NodeInterface) error {
+	var ipcPath string
+	ipcPath = viper.GetString("server.ipcPath")
+	if ipcPath == "" {
+		home, homeDirErr := os.UserHomeDir()
+		if homeDirErr != nil {
+			return homeDirErr
+		}
+		ipcPath = filepath.Join(home, ".vulcanize/vulcanize.ipc")
+	}
+	_, _, ipcErr := rpc.StartIPCEndpoint(ipcPath, superNode.APIs())
+	if ipcErr != nil {
+		return ipcErr
+	}
+
+	var wsEndpoint string
+	wsEndpoint = viper.GetString("server.wsEndpoint")
+	if wsEndpoint == "" {
+		wsEndpoint = "127.0.0.1:8080"
+	}
+	var exposeAll = true
+	var wsOrigins []string = nil
+	_, _, wsErr := rpc.StartWSEndpoint(wsEndpoint, superNode.APIs(), []string{"vdb"}, wsOrigins, exposeAll)
+	if wsErr != nil {
+		return wsErr
+	}
+	return nil
+}
+
+func newSuperNodeWithoutPairedGethNode() (super_node.NodeInterface, error) {
+	ipfsPath = viper.GetString("client.ipfsPath")
+	if ipfsPath == "" {
+		home, homeDirErr := os.UserHomeDir()
+		if homeDirErr != nil {
+			return nil, homeDirErr
+		}
+		ipfsPath = filepath.Join(home, ".ipfs")
+	}
+	ipfsInitErr := ipfs.InitIPFSPlugins()
+	if ipfsInitErr != nil {
+		return nil, ipfsInitErr
+	}
+	ipldFetcher, newFetcherErr := ipfs.NewIPLDFetcher(ipfsPath)
+	if newFetcherErr != nil {
+		return nil, newFetcherErr
+	}
+	db := utils.LoadPostgres(databaseConfig, core.Node{})
+	return &super_node.Service{
+		IPLDFetcher:       ipldFetcher,
+		Retriever:         super_node.NewCIDRetriever(&db),
+		Resolver:          ipfs.NewIPLDResolver(),
+		Subscriptions:     make(map[common.Hash]map[rpc.ID]super_node.Subscription),
+		SubscriptionTypes: make(map[common.Hash]config.Subscription),
+		GethNode:          core.Node{},
+	}, nil
+}