Use curl instead of netcat for pinging rootchain server in local depl…

…oyment script (#1791)

scripts/README.md

@@ -6,7 +6,7 @@ When deploying with `polybft` consensus, there are some additional dependencies:
 
 * [go 1.20.x](https://go.dev/dl/)
 * [jq](https://jqlang.github.io/jq)
-* Netcat (nc)
+* [curl](https://everything.curl.dev/get)
 
 ## Local development
 

scripts/cluster

@@ -10,8 +10,8 @@ if [[ "$1" == "polybft" ]] && ! command -v jq >/dev/null 2>&1; then
 fi
 
 # Check if nc is installed
-if [[ "$1" == "polybft" ]] && ! command -v nc >/dev/null 2>&1; then
-  echo "Netcat (nc) is not installed."
+if [[ "$1" == "polybft" ]] && ! command -v curl >/dev/null 2>&1; then
+  echo "curl is not installed."
   dp_error_flag=1
 fi
 
@@ -90,10 +90,10 @@ function initRootchain() {
   fi
 
   set +e
-  t=1
-  while [ $t -gt 0 ]; do
-    nc -z 127.0.0.1 8545 </dev/null
-    t=$?
+  while true; do
+    if curl -sSf -o /dev/null http://127.0.0.1:8545; then
+      break
+    fi
     sleep 1
   done
   set -e