C++ CMutableTransaction::GetHash方法代码示例

/**
 * 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);
}

// FIXME: Dedup with BuildSpendingTransaction in test/script_tests.cpp.
static CMutableTransaction BuildSpendingTransaction(const CScript& scriptSig, const CMutableTransaction& txCredit)
{
    CMutableTransaction txSpend;
    txSpend.nVersion = 1;
    txSpend.nLockTime = 0;
    txSpend.vin.resize(1);
    txSpend.vout.resize(1);
    txSpend.vin[0].prevout.hash = txCredit.GetHash();
    txSpend.vin[0].prevout.n = 0;
    txSpend.vin[0].scriptSig = scriptSig;
    txSpend.vin[0].nSequence = CTxIn::SEQUENCE_FINAL;
    txSpend.vout[0].scriptPubKey = CScript();
    txSpend.vout[0].nValue = txCredit.vout[0].nValue;

    return txSpend;
}

CMutableTransaction BuildSpendingTransaction(const CScript& scriptSig, const CMutableTransaction& txCredit)
{
    CMutableTransaction txSpend;
    txSpend.nVersion = 1;
    txSpend.nLockTime = 0;
    txSpend.vin.resize(1);
    txSpend.vout.resize(1);
    txSpend.vin[0].prevout.hash = txCredit.GetHash();
    txSpend.vin[0].prevout.n = 0;
    txSpend.vin[0].scriptSig = scriptSig;
    txSpend.vin[0].nSequence = std::numeric_limits<unsigned int>::max();
    txSpend.vout[0].scriptPubKey = CScript();
    txSpend.vout[0].nValue = 0;

    return txSpend;
}

static bool
Verify(const CScript& scriptSig, const CScript& scriptPubKey, bool fStrict, ScriptError& err)
{
    // Create dummy to/from transactions:
    CMutableTransaction txFrom;
    txFrom.vout.resize(1);
    txFrom.vout[0].scriptPubKey = scriptPubKey;

    CMutableTransaction txTo;
    txTo.vin.resize(1);
    txTo.vout.resize(1);
    txTo.vin[0].prevout.n = 0;
    txTo.vin[0].prevout.hash = txFrom.GetHash();
    txTo.vin[0].scriptSig = scriptSig;
    txTo.vout[0].nValue = 1;

    return VerifyScript(scriptSig, scriptPubKey, fStrict ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE, MutableTransactionSignatureChecker(&txTo, 0), &err);
}

/***
 *private helper functions
 */
QString MultisigDialog::buildMultisigTxStatusString(bool fComplete, const CMutableTransaction& tx)
{
    string sTxHex = EncodeHexTx(tx);

    if(fComplete){
        ui->commitButton->setEnabled(true);
        string sTxId = tx.GetHash().GetHex();
        string sTxComplete   =  "Complete: true!\n"
                                "The commit button has now been enabled for you to finalize the transaction.\n"
                                "Once the commit button is clicked, the transaction will be published and coins transferred "
                                "to their destinations.\nWARNING: THE ACTIONS OF THE COMMIT BUTTON ARE FINAL AND CANNOT BE REVERSED.";

        return QString(strprintf("%s\nTx Id:\n%s\nTx Hex:\n%s",sTxComplete, sTxId, sTxHex).c_str());
    } else {
        string sTxIncomplete = "Complete: false.\n"
                                "You may now send the hex below to another owner to sign.\n"
                                "Keep in mind the transaction must be passed from one owner to the next for signing.\n"
                                "Ensure all owners have imported the redeem before trying to sign. (besides creator)";

        return QString(strprintf("%s\nTx Hex: %s", sTxIncomplete, sTxHex).c_str());
    }
}

/**
 * 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.
 */
static void BuildTxs(CMutableTransaction& spendingTx, CCoinsViewCache& coins, CMutableTransaction& creationTx, const CScript& scriptPubKey, const CScript& scriptSig, const CScriptWitness& witness)
{
    creationTx.nVersion = 1;
    creationTx.vin.resize(1);
    creationTx.vin[0].prevout.SetNull();
    creationTx.vin[0].scriptSig = CScript();
    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.vin[0].scriptWitness = witness;
    spendingTx.vout.resize(1);
    spendingTx.vout[0].nValue = 1;
    spendingTx.vout[0].scriptPubKey = CScript();

    AddCoins(coins, creationTx, 0);
}

// Test suite for ancestor feerate transaction selection.
// Implemented as an additional function, rather than a separate test case,
// to allow reusing the blockchain created in CreateNewBlock_validity.
// Note that this test assumes blockprioritysize is 0.
void TestPackageSelection(const CChainParams& chainparams, CScript scriptPubKey, std::vector<CTransaction *>& txFirst)
{
    // Test the ancestor feerate transaction selection.
    TestMemPoolEntryHelper entry;

    // Test that a medium fee transaction will be selected after a higher fee
    // rate package with a low fee rate parent.
    CMutableTransaction tx;
    tx.vin.resize(1);
    tx.vin[0].scriptSig = CScript() << OP_1;
    tx.vin[0].prevout.hash = txFirst[0]->GetHash();
    tx.vin[0].prevout.n = 0;
    tx.vout.resize(1);
    tx.vout[0].nValue = 5000000000LL - 1000;
    // This tx has a low fee: 1000 satoshis
    uint256 hashParentTx = tx.GetHash(); // save this txid for later use
    mempool.addUnchecked(hashParentTx, entry.Fee(1000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));

    // This tx has a medium fee: 10000 satoshis
    tx.vin[0].prevout.hash = txFirst[1]->GetHash();
    tx.vout[0].nValue = 5000000000LL - 10000;
    uint256 hashMediumFeeTx = tx.GetHash();
    mempool.addUnchecked(hashMediumFeeTx, entry.Fee(10000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));

    // This tx has a high fee, but depends on the first transaction
    tx.vin[0].prevout.hash = hashParentTx;
    tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 50k satoshi fee
    uint256 hashHighFeeTx = tx.GetHash();
    mempool.addUnchecked(hashHighFeeTx, entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));

    CBlockTemplate *pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
    BOOST_CHECK(pblocktemplate->block.vtx[1].GetHash() == hashParentTx);
    BOOST_CHECK(pblocktemplate->block.vtx[2].GetHash() == hashHighFeeTx);
    BOOST_CHECK(pblocktemplate->block.vtx[3].GetHash() == hashMediumFeeTx);

    // Test that a package below the min relay fee doesn't get included
    tx.vin[0].prevout.hash = hashHighFeeTx;
    tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 0 fee
    uint256 hashFreeTx = tx.GetHash();
    mempool.addUnchecked(hashFreeTx, entry.Fee(0).FromTx(tx));
    size_t freeTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);

    // Calculate a fee on child transaction that will put the package just
    // below the min relay fee (assuming 1 child tx of the same size).
    CAmount feeToUse = minRelayTxFee.GetFee(2*freeTxSize) - 1;

    tx.vin[0].prevout.hash = hashFreeTx;
    tx.vout[0].nValue = 5000000000LL - 1000 - 50000 - feeToUse;
    uint256 hashLowFeeTx = tx.GetHash();
    mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse).FromTx(tx));
    pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
    // Verify that the free tx and the low fee tx didn't get selected
    for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
        BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashFreeTx);
        BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashLowFeeTx);
    }

    // Test that packages above the min relay fee do get included, even if one
    // of the transactions is below the min relay fee
    // Remove the low fee transaction and replace with a higher fee transaction
    std::list<CTransaction> dummy;
    mempool.removeRecursive(tx, dummy);
    tx.vout[0].nValue -= 2; // Now we should be just over the min relay fee
    hashLowFeeTx = tx.GetHash();
    mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse+2).FromTx(tx));
    pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
    BOOST_CHECK(pblocktemplate->block.vtx[4].GetHash() == hashFreeTx);
    BOOST_CHECK(pblocktemplate->block.vtx[5].GetHash() == hashLowFeeTx);

    // Test that transaction selection properly updates ancestor fee
    // calculations as ancestor transactions get included in a block.
    // Add a 0-fee transaction that has 2 outputs.
    tx.vin[0].prevout.hash = txFirst[2]->GetHash();
    tx.vout.resize(2);
    tx.vout[0].nValue = 5000000000LL - 100000000;
    tx.vout[1].nValue = 100000000; // 1BTC output
    uint256 hashFreeTx2 = tx.GetHash();
    mempool.addUnchecked(hashFreeTx2, entry.Fee(0).SpendsCoinbase(true).FromTx(tx));

    // This tx can't be mined by itself
    tx.vin[0].prevout.hash = hashFreeTx2;
    tx.vout.resize(1);
    feeToUse = minRelayTxFee.GetFee(freeTxSize);
    tx.vout[0].nValue = 5000000000LL - 100000000 - feeToUse;
    uint256 hashLowFeeTx2 = tx.GetHash();
    mempool.addUnchecked(hashLowFeeTx2, entry.Fee(feeToUse).SpendsCoinbase(false).FromTx(tx));
    pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);

    // Verify that this tx isn't selected.
    for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
        BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashFreeTx2);
        BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashLowFeeTx2);
    }

    // This tx will be mineable, and should cause hashLowFeeTx2 to be selected
    // as well.
//.........这里部分代码省略.........

static void TestPackageSelection(const CChainParams& chainparams, const CScript& scriptPubKey, const std::vector<CTransactionRef>& txFirst) EXCLUSIVE_LOCKS_REQUIRED(::mempool.cs)
{
    // Test the ancestor feerate transaction selection.
    TestMemPoolEntryHelper entry;

    // Test that a medium fee transaction will be selected after a higher fee
    // rate package with a low fee rate parent.
    CMutableTransaction tx;
    tx.vin.resize(1);
    tx.vin[0].scriptSig = CScript() << OP_1;
    tx.vin[0].prevout.hash = txFirst[0]->GetHash();
    tx.vin[0].prevout.n = 0;
    tx.vout.resize(1);
    tx.vout[0].nValue = 5000000000LL - 1000;
    // This tx has a low fee: 1000 satoshis
    uint256 hashParentTx = tx.GetHash(); // save this txid for later use
    mempool.addUnchecked(entry.Fee(1000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));

    // This tx has a medium fee: 10000 satoshis
    tx.vin[0].prevout.hash = txFirst[1]->GetHash();
    tx.vout[0].nValue = 5000000000LL - 10000;
    uint256 hashMediumFeeTx = tx.GetHash();
    mempool.addUnchecked(entry.Fee(10000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));

    // This tx has a high fee, but depends on the first transaction
    tx.vin[0].prevout.hash = hashParentTx;
    tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 50k satoshi fee
    uint256 hashHighFeeTx = tx.GetHash();
    mempool.addUnchecked(entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));

    std::unique_ptr<CBlockTemplate> pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey);

//.........这里部分代码省略.........
                  break;
                }
              txin.scriptSig
                << ValtypeFromString (it->second.killer.ToString ());
            }
          break;

        case KilledByInfo::KILLED_SPAWN:
          txin.scriptSig << vchName << GAMEOP_KILLED_BY;
          break;

        case KilledByInfo::KILLED_POISON:
          txin.scriptSig << vchName << GAMEOP_KILLED_POISON;
          break;

        default:
          assert (false);
        }

      txKills.vin.push_back (txin);
      haveTxKills = true;
    }
  if (haveTxKills)
    {
      const CTransaction tx(txKills);
      assert (tx.IsGameTx () && !tx.IsBountyTx ());
      vGameTx.push_back (tx);
    }

  /* Pay bounties to the players who collected them.  The transaction
     inputs are just "dummy" containing informational messages.  */

  bool haveTxBounties = false;
  CMutableTransaction txBounties;
  txBounties.SetGameTx ();

  txBounties.vin.reserve (stepResult.bounties.size ());
  txBounties.vout.reserve (stepResult.bounties.size ());

  BOOST_FOREACH(const CollectedBounty& bounty, stepResult.bounties)
    {
      const valtype vchName = ValtypeFromString (bounty.character.player);
      CNameData data;
      if (!view.GetName (vchName, data))
        return error ("Game engine created bounty for non-existing player");

      CTxOut txout;
      txout.nValue = bounty.loot.nAmount;

      if (!bounty.address.empty ())
        {
          /* Player-provided addresses are validated before accepting them,
             so failing here is ok.  */
          CBitcoinAddress addr(bounty.address);
          if (!addr.IsValid ())
            return error ("Failed to set player-provided address for bounty");
          txout.scriptPubKey = GetScriptForDestination (addr.Get ());
        }
      else
        txout.scriptPubKey = data.getAddress ();

      txBounties.vout.push_back (txout);

      CTxIn txin;
      if (bounty.loot.IsRefund ())
        txin.scriptSig
          << vchName << GAMEOP_REFUND
          << bounty.character.index << bounty.loot.GetRefundHeight ();
      else
        txin.scriptSig
          << vchName << GAMEOP_COLLECTED_BOUNTY
          << bounty.character.index
          << bounty.loot.firstBlock
          << bounty.loot.lastBlock
          << bounty.loot.collectedFirstBlock
          << bounty.loot.collectedLastBlock;
      txBounties.vin.push_back (txin);

      haveTxBounties = true;
    }
  if (haveTxBounties)
    {
      const CTransaction tx(txBounties);
      assert (tx.IsGameTx () && tx.IsBountyTx ());
      vGameTx.push_back (tx);
    }

  /* Print log chatter.  */
  if (haveTxKills || haveTxBounties)
    {
      LogPrint ("game", "Game transactions @%d:\n", nHeight);
      if (haveTxKills)
        LogPrint ("game", "  kills:    %s\n", txKills.GetHash ().ToString ());
      if (haveTxBounties)
        LogPrint ("game", "  bounties: %s\n",
                  txBounties.GetHash ().ToString ());
    }

  return true;
}