Generic watcher that takes a contract address, grabs the contract abi and starting block number, creates custom event filters, and extracts and transforms event data into postgres. Can configure to look at only a subset of events through CLI flag. Building but needs testing.

2018-11-03 14:00:25 -05:00
parent 57820ff473
commit 8ce75fe5ad
13 changed files with 1011 additions and 1 deletions
@@ -0,0 +1,122 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/spf13/cobra"
+
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+	"github.com/vulcanize/vulcanizedb/pkg/geth"
+	"github.com/vulcanize/vulcanizedb/pkg/geth/client"
+	vRpc "github.com/vulcanize/vulcanizedb/pkg/geth/converters/rpc"
+	"github.com/vulcanize/vulcanizedb/pkg/geth/node"
+	"github.com/vulcanize/vulcanizedb/pkg/omni/transformer"
+	"github.com/vulcanize/vulcanizedb/pkg/omni/types"
+)
+
+// omniWatcherCmd represents the omniWatcher command
+var omniWatcherCmd = &cobra.Command{
+	Use:   "omniWatcher",
+	Short: "Watches events at the provided contract address",
+	Long: `Uses input contract address and event filters to watch events
+
+Expects an ethereum node to be running
+Expects an archival node synced into vulcanizeDB
+Requires a .toml config file:
+
+  [database]
+  name = "vulcanize_public"
+  hostname = "localhost"
+  port = 5432
+
+  [client]
+  ipcPath = "/Users/user/Library/Ethereum/geth.ipc"
+`,
+	Run: func(cmd *cobra.Command, args []string) {
+		omniWatcher()
+	},
+}
+
+func omniWatcher() {
+
+	if contractAddress == "" {
+		log.Fatal("Contract address required")
+	}
+
+	if contractEvents == nil {
+		var str string
+		for str != "y" {
+			reader := bufio.NewReader(os.Stdin)
+			fmt.Print("Warning: no events specified, proceeding to watch every event at address" + contractAddress + "? (Y/n)\n> ")
+			resp, err := reader.ReadBytes('\n')
+			if err != nil {
+				log.Fatal(err)
+			}
+
+			str = strings.ToLower(string(resp))
+			if str == "n" {
+				return
+			}
+		}
+	}
+
+	rawRpcClient, err := rpc.Dial(ipc)
+	if err != nil {
+		log.Fatal(err)
+	}
+	rpcClient := client.NewRpcClient(rawRpcClient, ipc)
+	ethClient := ethclient.NewClient(rawRpcClient)
+	client := client.NewEthClient(ethClient)
+	node := node.MakeNode(rpcClient)
+	transactionConverter := vRpc.NewRpcTransactionConverter(ethClient)
+	blockChain := geth.NewBlockChain(client, node, transactionConverter)
+	db, err := postgres.NewDB(databaseConfig, blockChain.Node())
+	if err != nil {
+		log.Fatal(fmt.Sprintf("Failed to initialize database\r\nerr: %v\r\n", err))
+	}
+
+	con := types.Config{
+		DB:      db,
+		BC:      blockChain,
+		Network: network,
+	}
+
+	t := transformer.NewTransformer(&con)
+	t.Set(contractAddress, contractEvents)
+
+	err = t.Init()
+	if err != nil {
+		log.Fatal(fmt.Sprintf("Failed to initialized generator\r\nerr: %v\r\n", err))
+	}
+
+	log.Fatal(t.Execute())
+}
+
+func init() {
+	rootCmd.AddCommand(omniWatcherCmd)
+
+	omniWatcherCmd.Flags().StringVarP(&contractAddress, "contract-address", "a", "", "Single address to generate watchers for")
+	omniWatcherCmd.Flags().StringArrayVarP(&contractEvents, "contract-events", "e", []string{}, "Subset of events to watch- use only with single address")
+	omniWatcherCmd.Flags().StringArrayVarP(&contractAddresses, "contract-addresses", "l", []string{}, "Addresses of the contracts to generate watchers for")
+	omniWatcherCmd.Flags().StringVarP(&network, "network", "n", "", `Network the contract is deployed on; options: "ropsten", "kovan", and "rinkeby"; default is mainnet"`)
+}
@@ -32,6 +32,10 @@ var (
 	startingBlockNumber int64
 	syncAll             bool
 	endingBlockNumber   int64
+	network             string
+	contractAddress     string
+	contractAddresses   []string
+	contractEvents      []string
 )

 var rootCmd = &cobra.Command{