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trie/bintrie: document zero-copy deserialization ownership contract

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CPerezz 2026-04-15 22:52:18 +02:00
parent 0f6b066156
commit 9769a68c84
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1 changed files with 5 additions and 1 deletions
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6
trie/bintrie/store_commit.go
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@ -133,11 +133,13 @@ func (s *NodeStore) SerializeNode(ref NodeRef) []byte {
var errInvalidSerializedLength = errors.New("invalid serialized node length")
// DeserializeNode deserializes a node from bytes, recomputing its hash.
// The serialized buffer must not be modified after this call.
func (s *NodeStore) DeserializeNode(serialized []byte, depth int) (NodeRef, error) {
return s.deserializeNode(serialized, depth, common.Hash{}, true)
}
// DeserializeNodeWithHash deserializes a node, using the provided hash.
// The serialized buffer must not be modified after this call.
func (s *NodeStore) DeserializeNodeWithHash(serialized []byte, depth int, hn common.Hash) (NodeRef, error) {
return s.deserializeNode(serialized, depth, hn, false)
}
@ -193,7 +195,9 @@ func (s *NodeStore) deserializeNode(serialized []byte, depth int, hn common.Hash
if len(serialized) < dataEnd {
return EmptyRef, errInvalidSerializedLength
}
// Zero-copy sub-slice of serialized data
// Zero-copy: valueData aliases the serialized buffer. The shared
// flag triggers copy-on-write via ensureWritable() before mutation.
// Callers must not modify serialized after this call.
sn.valueData = serialized[dataStart:dataEnd]
sn.shared = true
sn.depth = uint8(depth)