From 424824019b402b29d1d06967ad484c1d247f3d7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Mon, 6 Feb 2023 14:38:48 +0100
Subject: [PATCH] fix: ethtypes: Correct 'no uncles' hash in NewEthBlock

---
 chain/types/ethtypes/eth_types.go | 4 +++-
 lib/must/must.go                  | 9 +++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 lib/must/must.go

diff --git a/chain/types/ethtypes/eth_types.go b/chain/types/ethtypes/eth_types.go
index e84517396..9d1924d9c 100644
--- a/chain/types/ethtypes/eth_types.go
+++ b/chain/types/ethtypes/eth_types.go
@@ -22,6 +22,7 @@ import (
 	builtintypes "github.com/filecoin-project/go-state-types/builtin"
 
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/lib/must"
 )
 
 var (
@@ -157,13 +158,14 @@ type EthBlock struct {
 var (
 	EmptyEthBloom = [256]byte{}
 	EmptyEthHash  = EthHash{}
+	NoUncleHash   = must.One(ParseEthHash("0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347"))
 	EmptyEthInt   = EthUint64(0)
 	EmptyEthNonce = [8]byte{0, 0, 0, 0, 0, 0, 0, 0}
 )
 
 func NewEthBlock() EthBlock {
 	return EthBlock{
-		Sha3Uncles:       EmptyEthHash,
+		Sha3Uncles:       NoUncleHash,
 		StateRoot:        EmptyEthHash,
 		TransactionsRoot: EmptyEthHash,
 		ReceiptsRoot:     EmptyEthHash,
diff --git a/lib/must/must.go b/lib/must/must.go
new file mode 100644
index 000000000..e072b4e04
--- /dev/null
+++ b/lib/must/must.go
@@ -0,0 +1,9 @@
+package must
+
+func One[R any](r R, err error) R {
+	if err != nil {
+		panic(err)
+	}
+
+	return r
+}