fix oldstyle bitflip

OffchainLabs · Jul 22, 2022 · 5e0ee73 · 5e0ee73
1 parent f879b69
commit 5e0ee73
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/arbstate/inbox.go b/arbstate/inbox.go
@@ -213,8 +213,9 @@ func RecoverPayloadFromDasBatch(
 
 	if preimages != nil {
 		if version == 0 {
+			treeLeaf := dastree.FlatHashToTreeLeaf(dataHash)
 			preimages[dataHash] = payload
-			preimages[dastree.FlatHashToTreeHash(dataHash)] = dastree.FlatHashToTreeLeaf(dataHash)
+			preimages[crypto.Keccak256Hash(treeLeaf)] = treeLeaf
 		} else {
 			dastree.RecordHash(recordPreimage, payload)
 		}

diff --git a/das/dastree/dastree.go b/das/dastree/dastree.go
@@ -101,7 +101,7 @@ func HashBytes(preimage ...[]byte) []byte {
 func FlatHashToTreeHash(flat bytes32) bytes32 {
 	// Forms a degenerate dastree that's just a single leaf
 	// note: the inner preimage may be larger than the 64 kB standard
-	return arbmath.FlipBit(crypto.Keccak256Hash(append([]byte{LeafByte}, flat[:]...)), 0)
+	return arbmath.FlipBit(crypto.Keccak256Hash(FlatHashToTreeLeaf(flat)), 0)
 }
 
 func FlatHashToTreeLeaf(flat bytes32) []byte {