From f6f95f7c5ef656f19ba7d6bb2134be43ab6207da Mon Sep 17 00:00:00 2001
From: David <david@taikocha.in>
Date: Fri, 9 Dec 2022 21:06:07 +0800
Subject: [PATCH] feat: allow txList with zero byte

---
 packages/protocol/contracts/L1/v1/V1Proposing.sol | 2 +-
 packages/protocol/contracts/libs/LibTxDecoder.sol | 3 +++
 2 files changed, 4 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/LibTxDecoder.sol b/packages/protocol/contracts/libs/LibTxDecoder.sol
index a6c0d6e5db2..9dff797f56a 100644
--- a/packages/protocol/contracts/libs/LibTxDecoder.sol
+++ b/packages/protocol/contracts/libs/LibTxDecoder.sol
@@ -78,6 +78,9 @@ library LibTxDecoder {
     function decodeTxList(
         bytes calldata encoded
     ) public pure returns (TxList memory txList) {
+        if (encoded.length == 0) {
+            return txList;
+        }
         LibRLPReader.RLPItem[] memory txs = LibRLPReader.readList(encoded);
 
         Tx[] memory _txList = new Tx[](txs.length);