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fix calculation in get_tree_key_for_storage_slot (#35)

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This commit is contained in:
Guillaume Ballet 2021-11-23 21:18:30 +01:00
parent 361a328cb7
commit 7360d168c8
1 changed files with 7 additions and 3 deletions
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10
trie/utils/verkle.go
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@ -36,7 +36,7 @@ var (
CodeOffset = uint256.NewInt(128)
MainStorageOffset = new(uint256.Int).Lsh(uint256.NewInt(256), 31)
VerkleNodeWidth = uint256.NewInt(8)
codeStorageDelta = uint256.NewInt(0).Sub(HeaderStorageOffset, CodeOffset)
codeStorageDelta = uint256.NewInt(0).Sub(CodeOffset, HeaderStorageOffset)
)
func GetTreeKey(address []byte, treeIndex *uint256.Int, subIndex byte) []byte {
@ -94,10 +94,14 @@ func GetTreeKeyStorageSlot(address []byte, storageKey *uint256.Int) []byte {
treeIndex.Add(MainStorageOffset, storageKey)
}
treeIndex.Div(treeIndex, VerkleNodeWidth)
subIndexMod := new(uint256.Int).Mod(treeIndex, VerkleNodeWidth).Bytes()
// calculate the sub_index, i.e. the index in the stem tree.
// Because the modulus is 256, it's the last byte of treeIndex
subIndexMod := treeIndex.Bytes()
var subIndex byte
if len(subIndexMod) != 0 {
subIndex = subIndexMod[0]
// Get the last byte, as uint256.Int is big-endian
subIndex = subIndexMod[len(subIndexMod)-1]
}
return GetTreeKey(address, treeIndex, subIndex)
}