chore: add check if path to file is valid

environments/local/local.go

@@ -15,6 +15,14 @@ type Local struct {
 	id         string
 }
 
+func fileExists(path string) bool {
+	_, err := os.Stat(path)
+	if os.IsNotExist(err) {
+		return false
+	}
+	return err == nil
+}
+
 func NewLocalEnv() environments.Actions {
 	return &Local{
 		localNodes: map[string]*Node{},
@@ -35,6 +43,11 @@ func (l *Local) LoadConfig(cfg *network.Network) (string, error) {
 		if n.DataDir == "" {
 			n.DataDir = filepath.Join(baseTmpDir, n.ID, "data")
 		}
+
+		// check if the exec artifact path exists
+		if !fileExists(n.ExecArtifact) {
+			return "", fmt.Errorf("file does not exist at path: %s", n.ExecArtifact)
+		}
 	}
 
 	return l.id, nil

environments/local/local_test.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"github.com/vechain/networkhub/preset"
+	"strings"
 	"testing"
 	"time"
 
@@ -121,6 +122,19 @@ var networkJSON = fmt.Sprintf(`{
   ]
 }`, genesis, genesis, genesis)
 
+func TestLocalInvalidExecArtifact(t *testing.T) {
+	networkCfg, err := network.NewNetwork(
+		network.WithJSON(networkJSON),
+	)
+	require.NoError(t, err)
+
+	localEnv := NewLocalEnv()
+	_, err = localEnv.LoadConfig(networkCfg)
+	require.Error(t, err)
+
+	require.True(t, strings.HasPrefix(err.Error(), "file does not exist at path"))
+}
+
 func TestLocal(t *testing.T) {
 	t.Skip()
 	networkCfg, err := network.NewNetwork(

preset/preset.go

@@ -37,6 +37,7 @@ func (p *Networks) Load(id string, configPayload *APIConfigPayload) (*network.Ne
 	if configPayload == nil || configPayload.ArtifactPath == "" {
 		return nil, fmt.Errorf("preset config must be set")
 	}
+
 	// override the default path
 	for _, node := range preset.Nodes {
 		node.ExecArtifact = configPayload.ArtifactPath