Transaction

GetHash

由 3 部分组合而成：prefix, rctBase and rctPrunable

        // version 2 requires first computing 3 separate hashes
        // prefix, rctBase and rctPrunable
        // and then hashing the hashes together to get the final hash

GetPrefixHash

IsCoinbase

// returns whether the tx is coinbase

DeserializeHeader

Clear

// calculated prefi has signature

SerializeHeader

Serialize