Protocol::VERSION = 60002
check block_timestamp before p2sh (BIP 0016) processing
Bitcoin::Protocol::Parser handle notfound message

  https://github.com/bitcoin/bitcoin/blob/0e2e4fdf27dff95d5a6663ccf770d39451848f84/src/main.cpp#L3339

    // Let the peer know that we didn't find what it asked for, so it doesn't
    // have to wait around forever. Currently only SPV clients actually care
    // about this message: it's needed when they are recursively walking the
    // dependencies of relevant unconfirmed transactions. SPV clients want to
    // do that because they want to know about (and store and rebroadcast and
    // risk analyze) the dependencies of transactions relevant to them, without
    // having to download the entire memory pool.
    pfrom->PushMessage("notfound", vNotFound);
Bitcoin::Protocol::TxIn#add_signature_pubkey_script
Bitcoinn::Protocol::TxOut#value_to_address raise error if to_address_script failed.