From 6b188858db82785ccd02d5438c2421a9a7880c87 Mon Sep 17 00:00:00 2001
From: Kurdistan Tech Ministry <info@pezkuwichain.io>
Date: Tue, 10 Mar 2026 00:40:45 +0300
Subject: [PATCH] =?UTF-8?q?fix:=20prevent=20crash=20loop=20on=20pruned=20s?=
 =?UTF-8?q?tate=20=E2=80=94=20patch=20getExtrinsicSuccess=20and=20events.t?=
 =?UTF-8?q?oArray?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When SubQuery restarts and hits pruned blocks, events are empty (from patch 4).
This caused two downstream crashes:
- getExtrinsicSuccess(undefined) → TypeError on findIndex
- wrapBlock with events.toArray() → TypeError on undefined

Patches 5-6 handle undefined events gracefully.
---
 docker/patches/pruned-state-fallback.js | 29 ++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/docker/patches/pruned-state-fallback.js b/docker/patches/pruned-state-fallback.js
index 8ad802e..b7ef19d 100644
--- a/docker/patches/pruned-state-fallback.js
+++ b/docker/patches/pruned-state-fallback.js
@@ -66,4 +66,31 @@ utilsCode2 = utilsCode2.replace(
 fs.writeFileSync(utilsFile, utilsCode2);
 console.log(`[4/5] utils/substrate.js fetchEventsRange: ${count} patches`);
 
-console.log("[5/5] All pruned-state patches applied successfully.");
+// --- Patch 5: @subql/node utils/substrate.js (wrapExtrinsics / getExtrinsicSuccess) ---
+// When events are empty (pruned block), groupEventsByExtrinsic returns {}.
+// Then groupedEvents[idx] is undefined for each extrinsic, and
+// getExtrinsicSuccess(undefined) crashes with "Cannot read properties of undefined
+// (reading 'findIndex')". Fix: default to empty array when events is undefined.
+count = 0;
+let utilsCode3 = fs.readFileSync(utilsFile, "utf8");
+
+// Patch getExtrinsicSuccess to handle undefined events
+utilsCode3 = utilsCode3.replace(
+  /function getExtrinsicSuccess\(events\) \{/g,
+  () => { count++; return "function getExtrinsicSuccess(events) { if (!events || !events.findIndex) return false;"; }
+);
+fs.writeFileSync(utilsFile, utilsCode3);
+console.log(`[5/7] utils/substrate.js getExtrinsicSuccess: ${count} patches`);
+
+// --- Patch 6: @subql/node utils/substrate.js (events.toArray fallback) ---
+// When events is undefined or has no toArray method, default to empty array.
+count = 0;
+let utilsCode4 = fs.readFileSync(utilsFile, "utf8");
+utilsCode4 = utilsCode4.replace(
+  /const wrappedBlock = wrapBlock\(block, events\.toArray\(\), parentSpecVersion\);/g,
+  () => { count++; return "const wrappedBlock = wrapBlock(block, (events && events.toArray) ? events.toArray() : [], parentSpecVersion);"; }
+);
+fs.writeFileSync(utilsFile, utilsCode4);
+console.log(`[6/7] utils/substrate.js events.toArray: ${count} patches`);
+
+console.log("[7/7] All pruned-state patches applied successfully.");