work on wasm watchers

cmd/streamEthSubscribe.go

@@ -67,7 +67,11 @@ func streamEthSubscription() {
 	payloadChan := make(chan super_node.SubscriptionPayload, 20000)
 
 	// Subscribe to the super node service with the given config/filter parameters
-	sub, err := str.Stream(payloadChan, ethSubConfig)
+	rlpParams, err := rlp.EncodeToBytes(ethSubConfig)
+	if err != nil {
+		logWithCommand.Fatal(err)
+	}
+	sub, err := str.Stream(payloadChan, rlpParams)
 	if err != nil {
 		logWithCommand.Fatal(err)
 	}
@@ -83,17 +87,16 @@ func streamEthSubscription() {
 			var ethData eth.IPLDs
 			if err := rlp.DecodeBytes(payload.Data, &ethData); err != nil {
 				logWithCommand.Error(err)
+				continue
 			}
-			for _, headerRlp := range ethData.Headers {
-				var header types.Header
-				err = rlp.Decode(bytes.NewBuffer(headerRlp.Data), &header)
-				if err != nil {
-					logWithCommand.Error(err)
-					continue
-				}
-				fmt.Printf("Header number %d, hash %s\n", header.Number.Int64(), header.Hash().Hex())
-				fmt.Printf("header: %v\n", header)
+			var header types.Header
+			err = rlp.Decode(bytes.NewBuffer(ethData.Header.Data), &header)
+			if err != nil {
+				logWithCommand.Error(err)
+				continue
 			}
+			fmt.Printf("Header number %d, hash %s\n", header.Number.Int64(), header.Hash().Hex())
+			fmt.Printf("header: %v\n", header)
 			for _, trxRlp := range ethData.Transactions {
 				var trx types.Transaction
 				buff := bytes.NewBuffer(trxRlp.Data)
@@ -107,7 +110,7 @@ func streamEthSubscription() {
 				fmt.Printf("trx: %v\n", trx)
 			}
 			for _, rctRlp := range ethData.Receipts {
-				var rct types.ReceiptForStorage
+				var rct types.Receipt
 				buff := bytes.NewBuffer(rctRlp.Data)
 				stream := rlp.NewStream(buff, 0)
 				err = rct.DecodeRLP(stream)

cmd/watch.go

@@ -0,0 +1,43 @@
+// Copyright © 2020 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 (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// watchCmd represents the watch command
+var watchCmd = &cobra.Command{
+	Use:   "watch",
+	Short: "Watch and transform data from a chain source",
+	Long: `This command allows one to configure a set of wasm functions and SQL trigger functions
+that call them to watch and transform data from the specified chain source.
+
+A watcher is composed of four parts:
+1) Go execution engine- this command- which fetches raw chain data and adds it to the Postres queued ready data tables
+2) TOML config file which specifies what subset of chain data to fetch and from where and contains references to the below
+3) Set of WASM binaries which are loaded into Postgres and used by
+4) Set of PostgreSQL trigger functions which automatically act on data as it is inserted into the queued ready data tables`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("watch called")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(watchCmd)
+}