truncate large balances (#521)

* truncate large balances Signed-off-by: Guillaume Ballet <[email protected]> * add TODO in the code * make linter happy --------- Signed-off-by: Guillaume Ballet <[email protected]>
gballet · Oct 31, 2024 · 054f953 · 054f953
1 parent 8f53873
commit 054f953
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/trie/verkle.go b/trie/verkle.go
@@ -160,7 +160,15 @@ func (t *VerkleTrie) UpdateAccount(addr common.Address, acc *types.StateAccount,
 
 	binary.BigEndian.PutUint32(basicData[utils.BasicDataCodeSizeOffset-1:], uint32(codeLen))
 	binary.BigEndian.PutUint64(basicData[utils.BasicDataNonceOffset:], acc.Nonce)
+	// Because the balance is a max of 16 bytes, truncate
+	// the extra values. This happens in devmode, where
+	// 0xff**32 is allocated to the developer account.
 	balanceBytes := acc.Balance.Bytes()
+	// TODO: reduce the size of the allocation in devmode, then panic instead
+	// of truncating.
+	if len(balanceBytes) > 16 {
+		balanceBytes = balanceBytes[16:]
+	}
 	copy(basicData[32-len(balanceBytes):], balanceBytes[:])
 	values[utils.BasicDataLeafKey] = basicData[:]
 	values[utils.CodeHashLeafKey] = acc.CodeHash[:]