feat: add --insecure to test cmd (#375)

Co-authored-by: Caner Çıdam <canercidam01@gmail.com>

Author: fkondej

main.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"log"
 	"log/slog"
+	"net/url"
 	"os"
 	"sort"
 	"strings"
@@ -59,6 +60,7 @@ var (
 	testRPCURL        string
 	testELRPCURL      string
 	testTimeout       time.Duration
+	testInsecure      bool
 	portListFlag      bool
 )
 
@@ -507,11 +509,22 @@ var testCmd = &cobra.Command{
 	Short: "Send a test transaction to the local EL node",
 	RunE: func(cmd *cobra.Command, args []string) error {
 		cmd.SilenceUsage = true
+
 		ctx := mainctx.Get()
 		cfg := playground.DefaultTestTxConfig()
 		cfg.RPCURL = testRPCURL
 		cfg.ELRPCURL = testELRPCURL
 		cfg.Timeout = testTimeout
+		cfg.Insecure = testInsecure
+
+		// Suggest --insecure flag if any RPC URL uses https without insecure mode
+		for _, rpcURL := range []string{cfg.RPCURL, cfg.ELRPCURL} {
+			if parsed, err := url.Parse(rpcURL); err == nil && parsed.Scheme == "https" && !cfg.Insecure {
+				color.Yellow("Tip: If using self-signed certificates, consider adding --insecure flag")
+				break
+			}
+		}
+
 		return playground.SendTestTransaction(ctx, cfg)
 	},
 }
@@ -621,6 +634,7 @@ func main() {
 	testCmd.Flags().StringVar(&testRPCURL, "rpc", "http://localhost:8545", "Target RPC URL for sending transactions")
 	testCmd.Flags().StringVar(&testELRPCURL, "el-rpc", "", "EL RPC URL for chain queries (default: same as --rpc)")
 	testCmd.Flags().DurationVar(&testTimeout, "timeout", 2*time.Minute, "Timeout for waiting for transaction receipt")
+	testCmd.Flags().BoolVar(&testInsecure, "insecure", false, "Skip TLS certificate verification (for self-signed certs)")
 	rootCmd.AddCommand(testCmd)
 
 	if err := rootCmd.Execute(); err != nil {

playground/test_tx.go

@@ -3,14 +3,17 @@ package playground
 import (
 	"context"
 	"crypto/ecdsa"
+	"crypto/tls"
 	"fmt"
 	"math/big"
+	"net/http"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/ethereum/go-ethereum/rpc"
 )
 
 // TestTxConfig holds configuration for the test transaction
@@ -23,6 +26,7 @@ type TestTxConfig struct {
 	GasLimit   uint64
 	GasPrice   *big.Int
 	Timeout    time.Duration // Timeout for waiting for receipt. If 0, defaults to 2 minutes
+	Insecure   bool          // Skip TLS certificate verification
 }
 
 // DefaultTestTxConfig returns the default test transaction configuration
@@ -69,8 +73,25 @@ func SendTestTransaction(ctx context.Context, cfg *TestTxConfig) error {
 		elRPCURL = cfg.RPCURL
 	}
 
+	// dialRPC connects to an RPC endpoint, optionally skipping TLS verification
+	dialRPC := func(url string) (*ethclient.Client, error) {
+		if cfg.Insecure {
+			httpClient := &http.Client{
+				Transport: &http.Transport{
+					TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+				},
+			}
+			rpcClient, err := rpc.DialOptions(ctx, url, rpc.WithHTTPClient(httpClient))
+			if err != nil {
+				return nil, err
+			}
+			return ethclient.NewClient(rpcClient), nil
+		}
+		return ethclient.Dial(url)
+	}
+
 	// Connect to the EL RPC endpoint (for chain queries)
-	elClient, err := ethclient.Dial(elRPCURL)
+	elClient, err := dialRPC(elRPCURL)
 	if err != nil {
 		return fmt.Errorf("failed to connect to EL RPC: %w", err)
 	}
@@ -79,7 +100,7 @@ func SendTestTransaction(ctx context.Context, cfg *TestTxConfig) error {
 	// Connect to the target RPC endpoint (for sending transactions)
 	var targetClient *ethclient.Client
 	if cfg.RPCURL != elRPCURL {
-		targetClient, err = ethclient.Dial(cfg.RPCURL)
+		targetClient, err = dialRPC(cfg.RPCURL)
 		if err != nil {
 			return fmt.Errorf("failed to connect to target RPC: %w", err)
 		}