From c11f143783c6bd0595ec1ba3df0ed36e4e813c47 Mon Sep 17 00:00:00 2001
From: Martin Nikov <mnikov12@gmail.com>
Date: Fri, 19 Jan 2024 18:24:23 +0200
Subject: [PATCH] config(modules/lido/withdrawals-automation): Define
 `ExecStartPre` with kapi-url healthcheck

---
 modules/lido/withdrawals-automation/default.nix | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/modules/lido/withdrawals-automation/default.nix b/modules/lido/withdrawals-automation/default.nix
index b1a4133a..5fb62de8 100644
--- a/modules/lido/withdrawals-automation/default.nix
+++ b/modules/lido/withdrawals-automation/default.nix
@@ -82,6 +82,20 @@
         serviceConfig = lib.mkMerge [
           {
             Group = "lido";
+            ExecStartPre = pkgs.writeShellScript "healthcheck.sh" ''
+              #!/usr/bin/env bash
+              set -euo pipefail
+
+              while true; do
+              if ${lib.getExe pkgs.curl} -sSf ${cfg.args.kapi-url} > /dev/null; then
+                  echo "${cfg.args.kapi-url} is online"
+                  break
+              else
+                  echo "${cfg.args.kapi-url} is offline, waiting..."
+                  sleep 5  # Adjust the sleep duration as needed
+              fi
+              done
+            '';
             ExecStart = lib.getExe (pkgs.writeShellApplication {
               name = "repl";
               text = ''