本文整理汇总了C++中CCoinsViewCache类的典型用法代码示例。如果您正苦于以下问题:C++ CCoinsViewCache类的具体用法?C++ CCoinsViewCache怎么用?C++ CCoinsViewCache使用的例子?那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了CCoinsViewCache类的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ApplyTxInUndo
/**
* 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 CViewManager::ApplyTxInUndo(Coin &&undo, CCoinsViewCache &view, const COutPoint &out)
{
bool fClean = true;
if (view.HaveCoin(out))
fClean = false; // overwriting transaction output
if (undo.nHeight == 0)
{
// Missing undo metadata (height and coinbase). Older versions included this
// information only in undo records for the last spend of a transactions'
// outputs. This implies that it must be present for some other output of the same tx.
const Coin &alternate = AccessByTxid(view, out.hash);
if (!alternate.IsSpent())
{
undo.nHeight = alternate.nHeight;
undo.fCoinBase = alternate.fCoinBase;
} else
{
return DISCONNECT_FAILED; // adding output for transaction without known metadata
}
}
// The potential_overwrite parameter to AddCoin is only allowed to be false if we know for
// sure that the coin did not already exist in the cache. As we have queried for that above
// using HaveCoin, we don't need to guess. When fClean is false, a coin already existed and
// it is an overwrite.
view.AddCoin(out, std::move(undo), !fClean);
return fClean ? DISCONNECT_OK : DISCONNECT_UNCLEAN;
}
示例2: SetupDummyInputs
//
// Helper: create two dummy transactions, each with
// two outputs. The first has 11 and 50 CENT outputs
// paid to a TX_PUBKEY, the second 21 and 22 CENT outputs
// paid to a TX_PUBKEYHASH.
//
static std::vector<CMutableTransaction>
SetupDummyInputs(CBasicKeyStore& keystoreRet, CCoinsViewCache& coinsRet)
{
std::vector<CMutableTransaction> dummyTransactions;
dummyTransactions.resize(2);
// Add some keys to the keystore:
CKey key[4];
for (int i = 0; i < 4; i++)
{
key[i].MakeNewKey(i % 2);
keystoreRet.AddKey(key[i]);
}
// Create some dummy input transactions
dummyTransactions[0].vout.resize(2);
dummyTransactions[0].vout[0].nValue = 11*CENT;
dummyTransactions[0].vout[0].scriptPubKey << ToByteVector(key[0].GetPubKey()) << OP_CHECKSIG;
dummyTransactions[0].vout[1].nValue = 50*CENT;
dummyTransactions[0].vout[1].scriptPubKey << ToByteVector(key[1].GetPubKey()) << OP_CHECKSIG;
coinsRet.ModifyCoins(dummyTransactions[0].GetHash())->FromTx(dummyTransactions[0], 0);
dummyTransactions[1].vout.resize(2);
dummyTransactions[1].vout[0].nValue = 21*CENT;
dummyTransactions[1].vout[0].scriptPubKey = GetScriptForDestination(key[2].GetPubKey().GetID());
dummyTransactions[1].vout[1].nValue = 22*CENT;
dummyTransactions[1].vout[1].scriptPubKey = GetScriptForDestination(key[3].GetPubKey().GetID());
coinsRet.ModifyCoins(dummyTransactions[1].GetHash())->FromTx(dummyTransactions[1], 0);
return dummyTransactions;
}
示例3:
void
CNameTxUndo::apply (CCoinsViewCache& view) const
{
if (isNew)
view.DeleteName (name);
else
view.SetName (name, oldData, true);
}
示例4: AddCoins
void AddCoins(CCoinsViewCache& cache, const CTransaction &tx, int nHeight, bool check) {
bool fCoinbase = tx.IsCoinBase();
const uint256& txid = tx.GetHash();
for (size_t i = 0; i < tx.vout.size(); ++i) {
bool overwrite = check ? cache.HaveCoin(COutPoint(txid, i)) : fCoinbase;
// Always set the possible_overwrite flag to AddCoin for coinbase txn, in order to correctly
// deal with the pre-BIP30 occurrences of duplicate coinbase transactions.
cache.AddCoin(COutPoint(txid, i), Coin(tx.vout[i], nHeight, fCoinbase), overwrite);
}
}
示例5: AreInputsStandard
bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
{
if (tx.IsCoinBase())
return true; // Coinbases don't use vin normally
for (unsigned int i = 0; i < tx.vin.size(); i++)
{
const CTxOut& prev = mapInputs.AccessCoin(tx.vin[i].prevout).out;
std::vector<std::vector<unsigned char> > vSolutions;
txnouttype whichType;
// get the scriptPubKey corresponding to this input:
const CScript& prevScript = prev.scriptPubKey;
if (!Solver(prevScript, whichType, vSolutions))
return false;
if (whichType == TX_SCRIPTHASH)
{
std::vector<std::vector<unsigned char> > stack;
// convert the scriptSig into a stack, so we can inspect the redeemScript
if (!EvalScript(stack, tx.vin[i].scriptSig, SCRIPT_VERIFY_NONE, BaseSignatureChecker(), SIGVERSION_BASE))
return false;
if (stack.empty())
return false;
CScript subscript(stack.back().begin(), stack.back().end());
if (subscript.GetSigOpCount(true) > MAX_P2SH_SIGOPS) {
return false;
}
}
}
return true;
}
示例6: AreInputsStandard
bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
{
if (tx.IsCoinBase())
return true; // Coinbases don't use vin normally
for (unsigned int i = 0; i < tx.vin.size(); i++)
{
const CTxOut& prev = mapInputs.GetOutputFor(tx.vin[i]);
std::vector<std::vector<unsigned char> > vSolutions;
txnouttype whichType;
// get the scriptPubKey corresponding to this input:
const CScript& prevScript = prev.scriptPubKey;
if (!Solver(prevScript, whichType, vSolutions))
return false;
int nArgsExpected = ScriptSigArgsExpected(whichType, vSolutions);
if (nArgsExpected < 0)
return false;
// Transactions with extra stuff in their scriptSigs are
// non-standard. Note that this EvalScript() call will
// be quick, because if there are any operations
// beside "push data" in the scriptSig
// IsStandardTx() will have already returned false
// and this method isn't called.
std::vector<std::vector<unsigned char> > stack;
if (!EvalScript(stack, tx.vin[i].scriptSig, SCRIPT_VERIFY_NONE, BaseSignatureChecker()))
return false;
if (whichType == TX_SCRIPTHASH)
{
if (stack.empty())
return false;
CScript subscript(stack.back().begin(), stack.back().end());
std::vector<std::vector<unsigned char> > vSolutions2;
txnouttype whichType2;
if (Solver(subscript, whichType2, vSolutions2))
{
int tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2);
if (tmpExpected < 0)
return false;
nArgsExpected += tmpExpected;
}
else
{
// Any other Script with less than 15 sigops OK:
unsigned int sigops = subscript.GetSigOpCount(true);
// ... extra data left on the stack after execution is OK, too:
return (sigops <= MAX_P2SH_SIGOPS);
}
}
if (stack.size() != (unsigned int)nArgsExpected)
return false;
}
return true;
}
示例7: AddCoins
void AddCoins(CCoinsViewCache& cache, const CTransaction &tx, int nHeight) {
bool fCoinbase = tx.IsCoinBase();
const uint256& txid = tx.GetHash();
for (size_t i = 0; i < tx.vout.size(); ++i) {
// Pass fCoinbase as the possible_overwrite flag to AddCoin, in order to correctly
// deal with the pre-BIP30 occurrances of duplicate coinbase transactions.
cache.AddCoin(COutPoint(txid, i), Coin(tx.vout[i], nHeight, fCoinbase), fCoinbase);
}
}
示例8: CheckTxInputs
bool Consensus::CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoinsViewCache& inputs, int nSpendHeight, CAmount& txfee)
{
// are the actual inputs available?
if (!inputs.HaveInputs(tx)) {
return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputs-missingorspent", false,
strprintf("%s: inputs missing/spent", __func__));
}
CAmount nValueIn = 0;
for (unsigned int i = 0; i < tx.vin.size(); ++i) {
const COutPoint &prevout = tx.vin[i].prevout;
const Coin& coin = inputs.AccessCoin(prevout);
assert(!coin.IsSpent());
// If prev is coinbase, check that it's matured
if (coin.IsCoinBase() && nSpendHeight - coin.nHeight < COINBASE_MATURITY) {
return state.Invalid(false,
REJECT_INVALID, "bad-txns-premature-spend-of-coinbase",
strprintf("tried to spend coinbase at depth %d", nSpendHeight - coin.nHeight));
}
// Check for negative or overflow input values
nValueIn += coin.out.nValue;
if (!MoneyRange(coin.out.nValue) || !MoneyRange(nValueIn)) {
return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputvalues-outofrange");
}
}
const CAmount value_out = tx.GetValueOut();
if (nValueIn < value_out) {
return state.DoS(100, false, REJECT_INVALID, "bad-txns-in-belowout", false,
strprintf("value in (%s) < value out (%s)", FormatMoney(nValueIn), FormatMoney(value_out)));
}
// Tally transaction fees
const CAmount txfee_aux = nValueIn - value_out;
if (!MoneyRange(txfee_aux)) {
return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-outofrange");
}
txfee = txfee_aux;
return true;
}
示例9: addTestCoin
/**
* Construct a dummy tx that provides the given script as input
* for further tests in the given CCoinsView. The txid is returned
* to refer to it. The "index" is always 0. The output's
* value is always set to 1000 COIN, since it doesn't matter for
* the tests we are interested in.
* @param scr The script that should be provided as output.
* @param nHeight The height of the coin.
* @param view Add it to this view.
* @return The txid.
*/
static uint256
addTestCoin (const CScript& scr, unsigned nHeight, CCoinsViewCache& view)
{
CMutableTransaction mtx;
mtx.vout.push_back (CTxOut (1000 * COIN, scr));
const CTransaction tx(mtx);
CCoinsModifier entry = view.ModifyCoins (tx.GetHash ());
*entry = CCoins (tx, nHeight);
return tx.GetHash ();
}
示例10: IsWitnessStandard
bool IsWitnessStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
{
if (tx.IsCoinBase())
return true; // Coinbases are skipped
for (unsigned int i = 0; i < tx.vin.size(); i++)
{
// We don't care if witness for this input is empty, since it must not be bloated.
// If the script is invalid without witness, it would be caught sooner or later during validation.
if (tx.vin[i].scriptWitness.IsNull())
continue;
const CTxOut &prev = mapInputs.AccessCoin(tx.vin[i].prevout).out;
// get the scriptPubKey corresponding to this input:
CScript prevScript = prev.scriptPubKey;
if (prevScript.IsPayToScriptHash()) {
std::vector <std::vector<unsigned char> > stack;
// If the scriptPubKey is P2SH, we try to extract the redeemScript casually by converting the scriptSig
// into a stack. We do not check IsPushOnly nor compare the hash as these will be done later anyway.
// If the check fails at this stage, we know that this txid must be a bad one.
if (!EvalScript(stack, tx.vin[i].scriptSig, SCRIPT_VERIFY_NONE, BaseSignatureChecker(), SIGVERSION_BASE))
return false;
if (stack.empty())
return false;
prevScript = CScript(stack.back().begin(), stack.back().end());
}
int witnessversion = 0;
std::vector<unsigned char> witnessprogram;
// Non-witness program must not be associated with any witness
if (!prevScript.IsWitnessProgram(witnessversion, witnessprogram))
return false;
// Check P2WSH standard limits
if (witnessversion == 0 && witnessprogram.size() == 32) {
if (tx.vin[i].scriptWitness.stack.back().size() > MAX_STANDARD_P2WSH_SCRIPT_SIZE)
return false;
size_t sizeWitnessStack = tx.vin[i].scriptWitness.stack.size() - 1;
if (sizeWitnessStack > MAX_STANDARD_P2WSH_STACK_ITEMS)
return false;
for (unsigned int j = 0; j < sizeWitnessStack; j++) {
if (tx.vin[i].scriptWitness.stack[j].size() > MAX_STANDARD_P2WSH_STACK_ITEM_SIZE)
return false;
}
}
}
return true;
}
示例11: ConnectBlock
/** Apply the effects of a block on the utxo cache, ignoring that it may already have been applied. */
bool CViewManager::ConnectBlock(const CBlock &block, const CBlockIndex *pIndex, CCoinsViewCache &viewCache)
{
for (const CTransactionRef &tx : block.vtx)
{
if (!tx->IsCoinBase())
{
for (const CTxIn &txin : tx->vin)
{
viewCache.SpendCoin(txin.prevout);
}
}
// Pass check = true as every addition may be an overwrite.
AddCoins(viewCache, *tx, pIndex->nHeight, true);
}
return true;
}
示例12: GetP2SHSigOpCount
unsigned int GetP2SHSigOpCount(const CTransaction& tx, const CCoinsViewCache& inputs)
{
if (tx.IsCoinBase())
return 0;
unsigned int nSigOps = 0;
for (unsigned int i = 0; i < tx.vin.size(); i++)
{
const Coin& coin = inputs.AccessCoin(tx.vin[i].prevout);
assert(!coin.IsSpent());
const CTxOut &prevout = coin.out;
if (prevout.scriptPubKey.IsPayToScriptHash())
nSigOps += prevout.scriptPubKey.GetSigOpCount(tx.vin[i].scriptSig);
}
return nSigOps;
}
示例13: UpdateCoins
void CViewManager::UpdateCoins(const CTransaction &tx, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight)
{
// mark inputs spent
if (!tx.IsCoinBase())
{
txundo.vprevout.reserve(tx.vin.size());
for (const CTxIn &txin : tx.vin)
{
txundo.vprevout.emplace_back();
bool is_spent = inputs.SpendCoin(txin.prevout, &txundo.vprevout.back());
assert(is_spent);
}
}
// add outputs
AddCoins(inputs, tx, nHeight);
}
示例14: GetTransactionSigOpCost
int64_t GetTransactionSigOpCost(const CTransaction& tx, const CCoinsViewCache& inputs, int flags)
{
int64_t nSigOps = GetLegacySigOpCount(tx) * WITNESS_SCALE_FACTOR;
if (tx.IsCoinBase())
return nSigOps;
if (flags & SCRIPT_VERIFY_P2SH) {
nSigOps += GetP2SHSigOpCount(tx, inputs) * WITNESS_SCALE_FACTOR;
}
for (unsigned int i = 0; i < tx.vin.size(); i++)
{
const Coin& coin = inputs.AccessCoin(tx.vin[i].prevout);
assert(!coin.IsSpent());
const CTxOut &prevout = coin.out;
nSigOps += CountWitnessSigOps(tx.vin[i].scriptSig, prevout.scriptPubKey, &tx.vin[i].scriptWitness, flags);
}
return nSigOps;
}
示例15: BuildTxs
/**
* Builds a creationTx from scriptPubKey and a spendingTx from scriptSig
* and witness such that spendingTx spends output zero of creationTx.
* Also inserts creationTx's output into the coins view.
*/
void BuildTxs(CMutableTransaction& spendingTx, CCoinsViewCache& coins, CMutableTransaction& creationTx, const CScript& scriptPubKey, const CScript& scriptSig, const CTxInWitness& witness)
{
creationTx.nVersion = 1;
creationTx.vin.resize(1);
creationTx.vin[0].prevout.SetNull();
creationTx.vin[0].scriptSig = CScript();
creationTx.wit.vtxinwit.resize(1);
creationTx.vout.resize(1);
creationTx.vout[0].nValue = 1;
creationTx.vout[0].scriptPubKey = scriptPubKey;
spendingTx.nVersion = 1;
spendingTx.vin.resize(1);
spendingTx.vin[0].prevout.hash = creationTx.GetHash();
spendingTx.vin[0].prevout.n = 0;
spendingTx.vin[0].scriptSig = scriptSig;
spendingTx.wit.vtxinwit.resize(1);
spendingTx.wit.vtxinwit[0] = witness;
spendingTx.vout.resize(1);
spendingTx.vout[0].nValue = 1;
spendingTx.vout[0].scriptPubKey = CScript();
coins.ModifyCoins(creationTx.GetHash())->FromTx(creationTx, 0);
}