103 lines
3.2 KiB
Go
103 lines
3.2 KiB
Go
// Copyright 2018 Vulcanize
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"log"
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"time"
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"github.com/ethereum/go-ethereum/ethclient"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/spf13/cobra"
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"github.com/vulcanize/vulcanizedb/examples/constants"
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"github.com/vulcanize/vulcanizedb/examples/erc20_watcher/event_triggered/dai"
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"github.com/vulcanize/vulcanizedb/examples/erc20_watcher/every_block"
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"github.com/vulcanize/vulcanizedb/examples/generic"
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"github.com/vulcanize/vulcanizedb/libraries/shared"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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"github.com/vulcanize/vulcanizedb/pkg/geth"
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"github.com/vulcanize/vulcanizedb/pkg/geth/client"
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vRpc "github.com/vulcanize/vulcanizedb/pkg/geth/converters/rpc"
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"github.com/vulcanize/vulcanizedb/pkg/geth/node"
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)
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// erc20Cmd represents the erc20 command
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var erc20Cmd = &cobra.Command{
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Use: "erc20",
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Short: "Fetches and persists token supply",
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Long: `Fetches transfer and approval events, totalSupply, allowances, and
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balances for the configured token from each block and persists it in Vulcanize DB.
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vulcanizedb erc20 --config environments/public
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Expects an ethereum node to be running and requires a .toml config file:
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[database]
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name = "vulcanize_public"
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hostname = "localhost"
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port = 5432
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[client]
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ipcPath = "/Users/user/Library/Ethereum/geth.ipc"
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`,
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Run: func(cmd *cobra.Command, args []string) {
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watchERC20s()
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},
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}
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func watchERC20s() {
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ticker := time.NewTicker(5 * time.Second)
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defer ticker.Stop()
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rawRpcClient, err := rpc.Dial(ipc)
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if err != nil {
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log.Fatal(err)
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}
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rpcClient := client.NewRpcClient(rawRpcClient, ipc)
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ethClient := ethclient.NewClient(rawRpcClient)
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client := client.NewEthClient(ethClient)
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node := node.MakeNode(rpcClient)
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transactionConverter := vRpc.NewRpcTransactionConverter(ethClient)
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blockChain := geth.NewBlockChain(client, node, transactionConverter)
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db, err := postgres.NewDB(databaseConfig, blockChain.Node())
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if err != nil {
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log.Fatal("Failed to initialize database.")
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}
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con := generic.DaiConfig
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con.Filters = constants.DaiERC20Filters
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watcher := shared.Watcher{
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DB: *db,
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Blockchain: blockChain,
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}
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// It is important that the event transformer is executed before the every_block transformer
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// because the events are used to generate the token holder address list that is used to
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// collect balances and allowances at every block
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transformers := append(dai.DaiEventTriggeredTransformerInitializer(), every_block.ERC20EveryBlockTransformerInitializer()...)
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err = watcher.AddTransformers(transformers, con)
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if err != nil {
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log.Fatal(err)
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}
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for range ticker.C {
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watcher.Execute()
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}
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}
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func init() {
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rootCmd.AddCommand(erc20Cmd)
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}
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