public static NodeType GetNodeType(RlpDecoder rlp)
{
if (rlp.Count == 17)
{
return(NodeType.FullNode);
}
if (rlp.Count == 2)
{
return(TrieKey.Decode(rlp[0].Value).HasTerm ? NodeType.ValueNode : NodeType.ShortNode);
}
return(NodeType.EmptyNode);
}
// RLP를 디코딩하여 노드 상태를 완전하게 만든다.
internal TrieNode DecodeRLP()
{
if (ReferenceEquals(rlp, null))
{
throw new Exception("can't decode empty rlp");
}
if (!Parsed)
{
var rlp = new RlpDecoder(this.rlp);
if (Type == NodeType.FullNode)
{
if (rlp.Count != 17)
{
throw new Exception("can't decode rlp for full node");
}
// child node
chidrens = new TrieNode[16];
for (int i = 0; i < 16; i++)
{
byte[] node = trie.Read(rlp[i].Value);
chidrens[i] = node != null ? new TrieNode(trie, node) : null;
}
// value
value = rlp[16].Value;
}
else if (Type == NodeType.ShortNode)
{
if (rlp.Count != 2)
{
throw new Exception("can't decode rlp for short node");
}
// key
key = TrieKey.Decode(rlp[0].Value);
// next node
byte[] node = trie.Read(rlp[1].Value);
next = node != null ? new TrieNode(trie, node) : null;
}
else if (Type == NodeType.ValueNode)
{
if (rlp.Count != 2)
{
throw new Exception("can't decode rlp for value node");
}
// key
key = TrieKey.Decode(rlp[0].Value);
// value
value = rlp[1].Value;
}
else
{
throw new Exception("can't decoded rlp for unknown node type");
}
Parsed = true;
}
return(this);
}