From 1b54dd124a6fee50c8530cf8244d68cb6ce58182 Mon Sep 17 00:00:00 2001
From: Vasyl Ivanchuk <vasyl.ivanchuk@gmail.com>
Date: Tue, 5 Nov 2024 13:58:55 +0200
Subject: [PATCH] chore: add a comment about nullable tx receipt root field

---
 packages/worker/src/entities/transactionReceipt.entity.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/worker/src/entities/transactionReceipt.entity.ts b/packages/worker/src/entities/transactionReceipt.entity.ts
index 1d74eaf05..dd3bc03a5 100644
--- a/packages/worker/src/entities/transactionReceipt.entity.ts
+++ b/packages/worker/src/entities/transactionReceipt.entity.ts
@@ -34,6 +34,8 @@ export class TransactionReceipt extends CountableEntity {
   @Column({ type: "int" })
   public readonly type: number;
 
+  // this field is only relevant on L1 pre byzantium fork (EIP658),
+  // but was present in ZKsync API before, so it cannot be just dropped.
   @Column({ type: "bytea", transformer: hexTransformer, nullable: true })
   public readonly root?: string;