ipld-eth-server/cmd/erc20.go

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// 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 (
"log"
"time"
"github.com/spf13/cobra"
"github.com/vulcanize/vulcanizedb/examples/erc20_watcher/every_block"
"github.com/vulcanize/vulcanizedb/libraries/shared"
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
)
// erc20Cmd represents the erc20 command
var erc20Cmd = &cobra.Command{
Use: "erc20",
Short: "Fetches and persists token supply",
Long: `Fetches the totalSupply for the configured token from each block and persists it in Vulcanize DB.
vulcanizedb erc20 --config environments/public
Expects an ethereum node to be running and 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) {
watchERC20s()
},
}
func watchERC20s() {
ticker := time.NewTicker(5 * time.Second)
defer ticker.Stop()
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blockChain := getBlockChain()
db, err := postgres.NewDB(databaseConfig, blockChain.Node())
if err != nil {
log.Fatal("Failed to initialize database.")
}
watcher := shared.Watcher{
DB: *db,
Blockchain: blockChain,
}
watcher.AddTransformers(every_block.TransformerInitializers())
for range ticker.C {
watcher.Execute()
}
}
func init() {
rootCmd.AddCommand(erc20Cmd)
}