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trie: implement trie-write filter-function

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Martin Holst Swende 2023-10-05 11:10:25 +02:00
parent a45fb1b385
commit 13cdb5eaf7
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1 changed files with 26 additions and 0 deletions
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26
trie/stackproof.go
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@ -394,3 +394,29 @@ func VerifyRangeProofWithStack(rootHash common.Hash, firstKey []byte, keys [][]b
// hasRightElement is true if the hashes we inserted are non-0
return len(hps) > 0, nil
}
// wrarpWriteFunction returns a NodeWriteFunc which filters away writes that are
// on the boundary: parents of first/last.
func wrapWriteFunction(origin, first, last []byte, w NodeWriteFunc) NodeWriteFunc {
if w == nil {
return nil
}
var originBorder = keybytesToHex(origin)
var leftBorder = keybytesToHex(first)
var rightBorder = keybytesToHex(last)
return func(origin common.Hash, path []byte, hash common.Hash, blob []byte) {
if bytes.HasPrefix(originBorder, path) {
//fmt.Printf("path %x tainted left (parent to %x)\n", path, leftBorder)
return
}
if bytes.HasPrefix(leftBorder, path) {
//fmt.Printf("path %x tainted left (parent to %x)\n", path, leftBorder)
return
}
if bytes.HasPrefix(rightBorder, path) {
//fmt.Printf("path %x tainted right (parent to %x)\n", path, rightBorder)
return
}
w(origin, path, hash, blob)
}
}