From 86344f667bd15b6ae301f3c319db99a24282d2b4 Mon Sep 17 00:00:00 2001
From: Alex Gartner <alexg@zetachain.com>
Date: Fri, 13 Sep 2024 18:41:04 -0700
Subject: [PATCH] fix(zetaclient): add block by number result nil check

---
 zetaclient/chains/evm/observer/observer.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/zetaclient/chains/evm/observer/observer.go b/zetaclient/chains/evm/observer/observer.go
index c10ecbc54f..39de0eedea 100644
--- a/zetaclient/chains/evm/observer/observer.go
+++ b/zetaclient/chains/evm/observer/observer.go
@@ -315,6 +315,9 @@ func (ob *Observer) BlockByNumber(blockNumber int) (*ethrpc.Block, error) {
 	if err != nil {
 		return nil, err
 	}
+	if block == nil {
+		return nil, fmt.Errorf("block not found: %d", blockNumber)
+	}
 	for i := range block.Transactions {
 		err := evm.ValidateEvmTransaction(&block.Transactions[i])
 		if err != nil {