Merge pull request #3 from vulcanize/contract_addr

derive contract addr util

.github/workflows/on-main.yml

@@ -3,7 +3,7 @@ name: Docker Compose Build
 on:
   push:
     branches:
-    - master
+    - main
 
 jobs:
   build:

cmd/deriveContract.go

@@ -0,0 +1,66 @@
+// 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/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// keyGenCmd represents the keyGen command
+var deriveContractCmd = &cobra.Command{
+	Use:   "deriveContract",
+	Short: "Derive contract address",
+	Long:  `Derive the contract address created from an pubkey/address and nonce`,
+	Run: func(cmd *cobra.Command, args []string) {
+		deriveContract()
+	},
+}
+
+func deriveContract() {
+	// and their .toml config bindings
+	nonce := viper.GetUint64("keyGen.nonce")
+	addrStr := viper.GetString("keyGen.address")
+	var addr common.Address
+	if addrStr == "" {
+		keyPath := viper.GetString("keyGen.path")
+		key, err := crypto.LoadECDSA(keyPath)
+		if err != nil {
+			logWithCommand.Fatal(err)
+		}
+		addr = crypto.PubkeyToAddress(key.PublicKey)
+	} else {
+		addr = common.HexToAddress(addrStr)
+	}
+	contractAddr := crypto.CreateAddress(addr, nonce)
+	fmt.Println(contractAddr.Hex())
+}
+
+func init() {
+	rootCmd.AddCommand(keyGenCmd)
+
+	keyGenCmd.PersistentFlags().Uint64("nonce", 0, "nonce to derive contract address from")
+	keyGenCmd.PersistentFlags().String("key-path", "", "path to public key to derive contract address from")
+	keyGenCmd.PersistentFlags().String("address", "", "address to derive contract address from")
+
+	viper.BindPFlag("keyGen.nonce", keyGenCmd.PersistentFlags().Lookup("nonce"))
+	viper.BindPFlag("keyGen.path", keyGenCmd.PersistentFlags().Lookup("key-path"))
+	viper.BindPFlag("keyGen.address", keyGenCmd.PersistentFlags().Lookup("address"))
+}