Merge pull request #4 from bcdevtools/feat/deploy-contract

imp: add new command to deploy an EVM contract using deployment bytecode

Author: 0xbcdev

cmd/tx/deploy-contract.go

@@ -0,0 +1,87 @@
+package tx
+
+import (
+	"bytes"
+	"context"
+	"encoding/hex"
+	"fmt"
+	"math/big"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
+
+	"github.com/bcdevtools/devd/v2/cmd/utils"
+	ethtypes "github.com/ethereum/go-ethereum/core/types"
+	"github.com/spf13/cobra"
+)
+
+func GetDeployContractEvmTxCommand() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "deploy-contract [bytecode]",
+		Short: `Deploy an EVM contract using bytecode.`,
+		Long: `Deploy an EVM contract.
+Predefined bytecode: erc20`,
+		Args: cobra.ExactArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			bytecode := strings.ToLower(args[0])
+			if bytecode == "erc20" {
+				bytecode = BytecodeErc20Contract
+			}
+			deployEvmContract(bytecode, cmd)
+		},
+	}
+
+	cmd.Flags().String(flagRpc, "", flagEvmRpcDesc)
+	cmd.Flags().String(flagSecretKey, "", flagSecretKeyDesc)
+
+	return cmd
+}
+
+func deployEvmContract(bytecode string, cmd *cobra.Command) {
+	ethClient8545, _ := mustGetEthClient(cmd)
+
+	_, ecdsaPrivateKey, _, from := mustSecretEvmAccount(cmd)
+
+	nonce, err := ethClient8545.NonceAt(context.Background(), *from, nil)
+	utils.ExitOnErr(err, "failed to get nonce of sender")
+
+	chainId, err := ethClient8545.ChainID(context.Background())
+	utils.ExitOnErr(err, "failed to get chain ID")
+
+	if strings.HasPrefix(bytecode, "0x") {
+		bytecode = bytecode[2:]
+	}
+	deploymentBytes, err := hex.DecodeString(bytecode)
+	utils.ExitOnErr(err, "failed to parse deployment bytecode")
+
+	txData := ethtypes.LegacyTx{
+		Nonce:    nonce,
+		GasPrice: big.NewInt(20_000_000_000),
+		Gas:      2_000_000,
+		To:       nil,
+		Data:     deploymentBytes,
+		Value:    common.Big0,
+	}
+	tx := ethtypes.NewTx(&txData)
+
+	newContractAddress := crypto.CreateAddress(*from, nonce)
+
+	fmt.Println("Deploying new contract using account", from)
+
+	signedTx, err := ethtypes.SignTx(tx, ethtypes.LatestSignerForChainID(chainId), ecdsaPrivateKey)
+	utils.ExitOnErr(err, "failed to sign tx")
+
+	var buf bytes.Buffer
+	err = signedTx.EncodeRLP(&buf)
+	utils.ExitOnErr(err, "failed to encode tx")
+
+	rawTxRLPHex := hex.EncodeToString(buf.Bytes())
+	fmt.Printf("RawTx: 0x%s\n", rawTxRLPHex)
+
+	err = ethClient8545.SendTransaction(context.Background(), signedTx)
+	utils.ExitOnErr(err, "failed to send tx")
+
+	fmt.Println("New contract deployed at")
+	fmt.Println(newContractAddress)
+}