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wallet: Refactor dummy signature signing for reusability

This commit is contained in:
Suhas Daftuar 2017-01-26 12:57:04 -05:00 committed by Suhas Daftuar
parent e99f0d7ad4
commit d625b907a1
2 changed files with 30 additions and 15 deletions
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18
src/wallet/wallet.cpp
View File

@ -2583,21 +2583,9 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
std::numeric_limits<unsigned int>::max() - (fWalletRbf ? 2 : 1)));
// Fill in dummy signatures for fee calculation.
int nIn = 0;
for (const auto& coin : setCoins)
{
const CScript& scriptPubKey = coin.first->tx->vout[coin.second].scriptPubKey;
SignatureData sigdata;
if (!ProduceSignature(DummySignatureCreator(this), scriptPubKey, sigdata))
{
strFailReason = _("Signing transaction failed");
return false;
} else {
UpdateTransaction(txNew, nIn, sigdata);
}
nIn++;
if (!DummySignTx(txNew, setCoins)) {
strFailReason = _("Signing transaction failed");
return false;
}
unsigned int nBytes = GetVirtualTransactionSize(txNew);

27
src/wallet/wallet.h
View File

@ -13,6 +13,7 @@
#include "utilstrencodings.h"
#include "validationinterface.h"
#include "script/ismine.h"
#include "script/sign.h"
#include "wallet/crypter.h"
#include "wallet/walletdb.h"
#include "wallet/rpcwallet.h"
@ -796,6 +797,8 @@ public:
void ListAccountCreditDebit(const std::string& strAccount, std::list<CAccountingEntry>& entries);
bool AddAccountingEntry(const CAccountingEntry&);
bool AddAccountingEntry(const CAccountingEntry&, CWalletDB *pwalletdb);
template <typename ContainerType>
bool DummySignTx(CMutableTransaction &txNew, const ContainerType &coins);
static CFeeRate minTxFee;
static CFeeRate fallbackFee;
@ -1028,4 +1031,28 @@ public:
}
};
// Helper for producing a bunch of max-sized low-S signatures (eg 72 bytes)
// ContainerType is meant to hold pair<CWalletTx *, int>, and be iterable
// so that each entry corresponds to each vIn, in order.
template <typename ContainerType>
bool CWallet::DummySignTx(CMutableTransaction &txNew, const ContainerType &coins)
{
// Fill in dummy signatures for fee calculation.
int nIn = 0;
for (const auto& coin : coins)
{
const CScript& scriptPubKey = coin.first->tx->vout[coin.second].scriptPubKey;
SignatureData sigdata;
if (!ProduceSignature(DummySignatureCreator(this), scriptPubKey, sigdata))
{
return false;
} else {
UpdateTransaction(txNew, nIn, sigdata);
}
nIn++;
}
return true;
}
#endif // BITCOIN_WALLET_WALLET_H