refactor: extract shared get_public_ip into helpers.sh

The get_public_ip() function was duplicated verbatim in both
op-node-entrypoint and base-consensus-entrypoint (23 lines each).
Any future change to IP detection logic would need to be made in two
places, increasing the risk of drift.

- Create helpers.sh with a single, documented get_public_ip function.
- Replace the inline definitions in op-node-entrypoint and
  base-consensus-entrypoint with source ./helpers.sh.
- Add COPY helpers.sh . to geth, reth, and nethermind Dockerfiles so
  the helper is available in all final images.

No functional change.

Author: mehmetkr-31

base-consensus-entrypoint

@@ -1,26 +1,7 @@
 #!/bin/bash
 set -eu
 
-get_public_ip() {
-  # Define a list of HTTP-based providers
-  local PROVIDERS=(
-    "http://ifconfig.me"
-    "http://api.ipify.org"
-    "http://ipecho.net/plain"
-    "http://v4.ident.me"
-  )
-  # Iterate through the providers until an IP is found or the list is exhausted
-  for provider in "${PROVIDERS[@]}"; do
-    local IP
-    IP=$(curl -s --max-time 10 --connect-timeout 5 "$provider")
-    # Check if IP contains a valid format (simple regex for an IPv4 address)
-    if [[ $IP =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-      echo "$IP"
-      return 0
-    fi
-  done
-  return 1
-}
+source ./helpers.sh
 
 if [[ -z "${BASE_NODE_NETWORK:-}" ]]; then
   echo "expected BASE_NODE_NETWORK to be set" 1>&2

geth/Dockerfile

@@ -40,5 +40,6 @@ COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 COPY geth/geth-entrypoint ./execution-entrypoint
 COPY op-node-entrypoint .
 COPY consensus-entrypoint .
+COPY helpers.sh .
 
 CMD ["/usr/bin/supervisord"]

helpers.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+# Shared helper functions used by Base node entrypoints
+
+# get_public_ip attempts to discover the node's public IPv4 address
+# by querying a list of HTTP-based IP detection services.
+# Prints the IP to stdout and returns 0 on success, 1 on failure.
+get_public_ip() {
+  local PROVIDERS=(
+    "http://ifconfig.me"
+    "http://api.ipify.org"
+    "http://ipecho.net/plain"
+    "http://v4.ident.me"
+  )
+
+  for provider in "${PROVIDERS[@]}"; do
+    local IP
+    IP=$(curl -s --max-time 10 --connect-timeout 5 "$provider")
+    if [[ $IP =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+      echo "$IP"
+      return 0
+    fi
+  done
+  return 1
+}

nethermind/Dockerfile

@@ -47,5 +47,6 @@ COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 COPY nethermind/nethermind-entrypoint ./execution-entrypoint
 COPY op-node-entrypoint .
 COPY consensus-entrypoint .
+COPY helpers.sh .
 
 CMD ["/usr/bin/supervisord"]

op-node-entrypoint

@@ -1,26 +1,7 @@
 #!/bin/bash
 set -eu
 
-get_public_ip() {
-  # Define a list of HTTP-based providers
-  local PROVIDERS=(
-    "http://ifconfig.me"
-    "http://api.ipify.org"
-    "http://ipecho.net/plain"
-    "http://v4.ident.me"
-  )
-  # Iterate through the providers until an IP is found or the list is exhausted
-  for provider in "${PROVIDERS[@]}"; do
-    local IP
-    IP=$(curl -s --max-time 10 --connect-timeout 5 "$provider")
-    # Check if IP contains a valid format (simple regex for an IPv4 address)
-    if [[ $IP =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-      echo "$IP"
-      return 0
-    fi
-  done
-  return 1
-}
+source ./helpers.sh
 
 if [[ -z "$OP_NODE_NETWORK" && -z "$OP_NODE_ROLLUP_CONFIG" ]]; then
   echo "expected OP_NODE_NETWORK to be set" 1>&2

reth/Dockerfile

@@ -71,5 +71,6 @@ COPY ./reth/reth-entrypoint ./execution-entrypoint
 COPY op-node-entrypoint .
 COPY base-consensus-entrypoint .
 COPY consensus-entrypoint .
+COPY helpers.sh .
 
 CMD ["/usr/bin/supervisord"]