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Use ModifyCoins instead of mutable GetCoins.

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Replace the mutable non-copying GetCoins method with a ModifyCoins, which
returns an encapsulated iterator, so we can keep track of concurrent
modifications (as iterators can be invalidated by those) and run cleanup
code after a modification is finished.

This also removes the overloading of the 'GetCoins' name.
This commit is contained in:
Pieter Wuille
2014-09-03 09:01:24 +02:00
parent 7a04f3d708
commit f28aec014e
5 changed files with 108 additions and 62 deletions
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18
src/bitcoin-tx.cpp
View File

@@ -384,21 +384,19 @@ static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
vector<unsigned char> pkData(ParseHexUV(prevOut, "scriptPubKey"));
CScript scriptPubKey(pkData.begin(), pkData.end());
CCoins coins;
if (view.GetCoins(txid, coins)) {
if (coins.IsAvailable(nOut) && coins.vout[nOut].scriptPubKey != scriptPubKey) {
{
CCoinsModifier coins = view.ModifyCoins(txid);
if (coins->IsAvailable(nOut) && coins->vout[nOut].scriptPubKey != scriptPubKey) {
string err("Previous output scriptPubKey mismatch:\n");
err = err + coins.vout[nOut].scriptPubKey.ToString() + "\nvs:\n"+
err = err + coins->vout[nOut].scriptPubKey.ToString() + "\nvs:\n"+
scriptPubKey.ToString();
throw runtime_error(err);
}
// what todo if txid is known, but the actual output isn't?
if ((unsigned int)nOut >= coins->vout.size())
coins->vout.resize(nOut+1);
coins->vout[nOut].scriptPubKey = scriptPubKey;
coins->vout[nOut].nValue = 0; // we don't know the actual output value
}
if ((unsigned int)nOut >= coins.vout.size())
coins.vout.resize(nOut+1);
coins.vout[nOut].scriptPubKey = scriptPubKey;
coins.vout[nOut].nValue = 0; // we don't know the actual output value
view.SetCoins(txid, coins);
// if redeemScript given and private keys given,
// add redeemScript to the tempKeystore so it can be signed: