I'm trying to come up with this function: CTransaction getTxFromPrevout(COutPoint prevo);
The idea being... when a new transaction is about to be validated, it will go through all of it's tx.vin[i].prevout and check for them funds (utxo).
So I want to find and identify the CTransaction tx such that tx.vout (of type vector<CTxOut> ) has any i element such that it's CScript is a normal payment (tx.vout[i].scriptPubKey.IsNormalPayment() == true) and the tx.vout[i].scriptPubKey has within it a match for the prevo
If I use a web based explorer I can take the prevo and extract the hash from it, then search the web for the tx... but that doesn't help me, since I want to be able to use this within the code itself, adding this new function. I tried following the code on an explorer and it uses the rpc api, and it was not easy to follow.
What I'm thinking is that there should be a utxo database structure or class that will make this easier to crawl through. If I suppose there is such a class named UTxODatabase - that I know there isn't, but just imagine there is - then the function I need to code would look like this:
CTransaction UTxODatabase::getTxFromPrevout(COutPoint prevo);
/*************************************************/
EDIT 1:
I put this at the very end of the CheckTransaction() function, in main.cpp
BOOST_FOREACH (const CTxIn& txin, tx.vin){
std::cout << "txin.prevPubKey.ToString(): " << txin.prevPubKey.ToString() << std::endl;
Then I've ran the wallet and the output shown for each txin was just: txin.prevPubKey.ToString:, without any prevPubKey data.
I am really confused about this.
My thinking was that if I'm able to get those prevPubKeys from the CTxIn, then I'll be able to track the utxo. But why would there be no information on that member of the txin at that stage?
CCoinsViewclass incoins.h, the functionvirtual bool GetCoin(const COutPoint &outpoint, Coin &coin) const;(or one of its overloads) might do what you need.virtualqualifier... the main function you referenced me to was:bool CCoinsView::GetCoins(const uint256& txid, CCoins& coins) const { return false; }... it just returns false. This seems to be on the right track, tho... and probably one of the other implementations should work... like this one:bool CCoinsViewBacked::GetCoins(const uint256& txid, CCoins& coins) const { return base->GetCoins(txid, coins); }But the truth is I'm not sure on how to use it Could be something like this?CTransaction CCoinsViewBacked::getTxFromPrevout(COutPoint prevo);