From 934c333f472ff43a0b285901d45d7b4a307b47a4 Mon Sep 17 00:00:00 2001
From: ygd58 <buraysandro9@gmail.com>
Date: Sat, 28 Mar 2026 19:59:19 +0100
Subject: [PATCH] feat: add meaningful is_healthy check to sequencer
 healthcheck

is_healthy is now true only if the block store is accessible and
has produced at least the genesis block.

Clients should poll chain_height twice with a delay to verify
the sequencer is making progress.

Refs #244
---
 sequencer/service/src/service.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sequencer/service/src/service.rs b/sequencer/service/src/service.rs
index 2ef8803f..8c8a8fb5 100644
--- a/sequencer/service/src/service.rs
+++ b/sequencer/service/src/service.rs
@@ -86,9 +86,14 @@ impl<BC: BlockSettlementClientTrait + Send + 'static, IC: IndexerClientTrait + S
     async fn check_health(&self) -> Result<HealthStatus, ErrorObjectOwned> {
         let sequencer = self.sequencer.lock().await;
         let chain_height = sequencer.chain_height();
+
+        // Sequencer is considered healthy if it has produced at least the genesis block.
+        // Clients should poll this endpoint twice with a delay to verify chain_height increases.
+        let is_healthy = sequencer.block_store().latest_block_meta().is_ok();
+
         Ok(HealthStatus {
             chain_height,
-            is_healthy: true,
+            is_healthy,
         })
     }