From ebc5db6ffe97f7003376d406420703849a9aec93 Mon Sep 17 00:00:00 2001
From: David <david@taikocha.in>
Date: Fri, 9 Dec 2022 20:53:33 +0800
Subject: [PATCH] feat: allow txList with zero byte

---
 packages/protocol/contracts/L1/v1/V1Proposing.sol     | 2 +-
 packages/protocol/contracts/libs/LibInvalidTxList.sol | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/protocol/contracts/L1/v1/V1Proposing.sol b/packages/protocol/contracts/L1/v1/V1Proposing.sol
index 6add00c3b10..0ef68db1b5d 100644
--- a/packages/protocol/contracts/L1/v1/V1Proposing.sol
+++ b/packages/protocol/contracts/L1/v1/V1Proposing.sol
@@ -77,7 +77,7 @@ library V1Proposing {
             bytes calldata txList = inputs[1];
             // perform validation and populate some fields
             require(
-                txList.length > 0 &&
+                txList.length >= 0 &&
                     txList.length <= LibConstants.K_TXLIST_MAX_BYTES &&
                     meta.txListHash == txList.hashTxList(),
                 "L1:txList"
diff --git a/packages/protocol/contracts/libs/LibInvalidTxList.sol b/packages/protocol/contracts/libs/LibInvalidTxList.sol
index 40d31051297..162dbcf3834 100644
--- a/packages/protocol/contracts/libs/LibInvalidTxList.sol
+++ b/packages/protocol/contracts/libs/LibInvalidTxList.sol
@@ -53,6 +53,10 @@ library LibInvalidTxList {
         Reason hint,
         uint256 txIdx
     ) internal pure returns (Reason) {
+        if (encoded.length == 0) {
+            return Reason.OK;
+        }
+
         if (encoded.length > LibConstants.K_TXLIST_MAX_BYTES) {
             return Reason.BINARY_TOO_LARGE;
         }