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Replace CTxInUndo with Coin

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The earlier CTxInUndo class now holds the same information as the Coin
class. Instead of duplicating functionality, replace CTxInUndo with a
serialization adapter for Coin.
This commit is contained in:
Pieter Wuille
2017-04-25 11:29:25 -07:00
parent 422634e2f5
commit cb2c7fdac2
3 changed files with 63 additions and 36 deletions
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18
src/validation.cpp
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@@ -1080,11 +1080,9 @@ void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, CTxUndo &txund
if (nPos >= coins->vout.size() || coins->vout[nPos].IsNull())
assert(false);
// mark an outpoint spent, and construct undo information
txundo.vprevout.push_back(CTxInUndo(coins->vout[nPos]));
coins->Spend(nPos);
CTxInUndo& undo = txundo.vprevout.back();
undo.nHeight = coins->nHeight;
undo.fCoinBase = coins->fCoinBase;
txundo.vprevout.emplace_back(coins->vout[nPos], coins->nHeight, coins->fCoinBase);
bool ret = coins->Spend(nPos);
assert(ret);
}
}
// add outputs
@@ -1252,13 +1250,13 @@ enum DisconnectResult
};
/**
* Apply the undo operation of a CTxInUndo to the given chain state.
* @param undo The undo object.
* Restore the UTXO in a Coin at a given COutPoint
* @param undo The Coin to be restored.
* @param view The coins view to which to apply the changes.
* @param out The out point that corresponds to the tx input.
* @return A DisconnectResult as an int
*/
int ApplyTxInUndo(const CTxInUndo& undo, CCoinsViewCache& view, const COutPoint& out)
int ApplyTxInUndo(const Coin& undo, CCoinsViewCache& view, const COutPoint& out)
{
bool fClean = true;
@@ -1279,7 +1277,7 @@ int ApplyTxInUndo(const CTxInUndo& undo, CCoinsViewCache& view, const COutPoint&
if (coins->IsAvailable(out.n)) fClean = false; // overwriting existing output
if (coins->vout.size() < out.n+1)
coins->vout.resize(out.n+1);
coins->vout[out.n] = undo.txout;
coins->vout[out.n] = undo.out;
return fClean ? DISCONNECT_OK : DISCONNECT_UNCLEAN;
}
@@ -1335,7 +1333,7 @@ static DisconnectResult DisconnectBlock(const CBlock& block, const CBlockIndex*
}
for (unsigned int j = tx.vin.size(); j-- > 0;) {
const COutPoint &out = tx.vin[j].prevout;
const CTxInUndo &undo = txundo.vprevout[j];
const Coin &undo = txundo.vprevout[j];
int res = ApplyTxInUndo(undo, view, out);
if (res == DISCONNECT_FAILED) return DISCONNECT_FAILED;
fClean = fClean && res != DISCONNECT_UNCLEAN;