multiop example: allow skipping the server cert

.github/workflows/checks.yml

@@ -1,6 +1,10 @@
 name: Checks
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   test:

examples/send-multioperator-orderflow/main.go

@@ -18,9 +18,10 @@ import (
 )
 
 var (
-	// Builder node endpoint and certificate
-	endpoint = "https://127.0.0.1:443"
-	certPEM  = []byte("-----BEGIN CERTIFICATE-----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\n1WlX3whjllaqr33K7kAa9ntihWfo+VB9zg==\n-----END CERTIFICATE-----\n")
+	// Builder node nodeEndpoint and certificate
+	nodeEndpoint   = "https://127.0.0.1:443"
+	nodeCertPEM    = []byte("-----BEGIN CERTIFICATE-----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\n1WlX3whjllaqr33K7kAa9ntihWfo+VB9zg==\n-----END CERTIFICATE-----\n")
+	ignoreNodeCert = false // if set to true, the client will ignore the server certificate and connect to the endpoint without verifying it
 
 	// Transaction and signing key
 	rawTxHex         = "0x02f8710183195414808503a1e38a30825208947804a60641a89c9c3a31ab5abea2a18c2b6b48408788c225841b2a9f80c080a0df68a9664190a59005ab6d6cc6b8e5a1e25604f546c36da0fd26ddd44d8f7d50a05b1bcfab22a3017cabb305884d081171e0f23340ae2a13c04eb3b0dd720a0552"
@@ -40,24 +41,35 @@ func createTransportForSelfSignedCert(certPEM []byte) (*http.Transport, error) {
 	}, nil
 }
 
-func exampleSendRawTx() error {
-	requestSigner, err := signature.NewSignerFromHexPrivateKey(signerPrivateKey)
-	if err != nil {
-		return err
+func exampleSendRawTx() (err error) {
+	// Create a transport that verifies (or ignores) the server certificate
+	var transport *http.Transport
+	if ignoreNodeCert {
+		transport = &http.Transport{
+			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+		}
+	} else {
+		transport, err = createTransportForSelfSignedCert(nodeCertPEM)
+		if err != nil {
+			return err
+		}
 	}
 
-	transport, err := createTransportForSelfSignedCert(certPEM)
+	// Prepare the request signer
+	requestSigner, err := signature.NewSignerFromHexPrivateKey(signerPrivateKey)
 	if err != nil {
 		return err
 	}
 
-	client := rpcclient.NewClientWithOpts(endpoint, &rpcclient.RPCClientOpts{
+	// Setup the RPC client
+	client := rpcclient.NewClientWithOpts(nodeEndpoint, &rpcclient.RPCClientOpts{
 		HTTPClient: &http.Client{
 			Transport: transport,
 		},
 		Signer: requestSigner,
 	})
 
+	// Execute the eth_sendRawTransaction request
 	rawTransaction := hexutil.MustDecode(rawTxHex)
 	resp, err := client.Call(context.Background(), "eth_sendRawTransaction", rpctypes.EthSendRawTransactionArgs(rawTransaction))
 	if err != nil {