X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FCTransaction.cs;h=3434842c64f49fb969a164b7592641201490e3fd;hb=c45ca30262ee9cf9e6be22d31c0a2dddeffe4e17;hp=8402b1207698cd22cf3ccd1fb04cf54e5da18e86;hpb=b9cd39da5b7744f29c938ec53a99f7595e71c9ad;p=NovacoinLibrary.git
diff --git a/Novacoin/CTransaction.cs b/Novacoin/CTransaction.cs
index 8402b12..3434842 100644
--- a/Novacoin/CTransaction.cs
+++ b/Novacoin/CTransaction.cs
@@ -21,6 +21,7 @@ using System.Text;
using System.Collections.Generic;
using System.IO;
using System.Diagnostics.Contracts;
+using System.Numerics;
namespace Novacoin
{
@@ -48,19 +49,36 @@ namespace Novacoin
public class CTransaction
{
///
+ /// One cent = 10000 satoshis.
+ ///
+ public const long nCent = 10000;
+
+ ///
/// One coin = 1000000 satoshis.
///
- public const ulong nCoin = 1000000;
+ public const long nCoin = 1000000;
+
///
/// Sanity checking threshold.
///
- public const ulong nMaxMoney = 2000000000 * nCoin;
+ public const long nMaxMoney = 2000000000 * nCoin;
+
+ public const long nMinTxFee = nCent / 10;
+ public const long nMinRelayTxFee = nCent / 50;
+ public const long nMinTxoutAmount = nCent / 100;
///
/// Maximum transaction size is 250Kb
///
public const uint nMaxTxSize = 250000;
+ public enum MinFeeMode
+ {
+ GMF_BLOCK,
+ GMF_RELAY,
+ GMF_SEND,
+ }
+
///
/// Version of transaction schema.
///
@@ -138,15 +156,15 @@ namespace Novacoin
return true;
}
- CTransaction txPrev = null;
for (int i = 0; i < vin.Length; i++)
{
var outpoint = vin[i].prevout;
- if (!CBlockStore.Instance.GetTransaction(outpoint.hash, ref txPrev))
+ TxOutItem txOutCursor;
+ if (!CBlockStore.Instance.GetTxOutCursor(outpoint, out txOutCursor))
return false;
- if (!ScriptCode.VerifyScript(vin[i].scriptSig, txPrev.vout[outpoint.n].scriptPubKey, this, i, (int)scriptflag.SCRIPT_VERIFY_P2SH, 0))
+ if (!ScriptCode.VerifyScript(vin[i].scriptSig, txOutCursor.scriptPubKey, this, i, (int)scriptflag.SCRIPT_VERIFY_P2SH, 0))
return false;
}
@@ -161,10 +179,17 @@ namespace Novacoin
get
{
uint nSigOps = 0;
- foreach (var txin in vin)
+
+ if (!IsCoinBase)
{
- nSigOps += txin.scriptSig.GetSigOpCount(false);
+ // http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2012-July/001718.html
+
+ foreach (var txin in vin)
+ {
+ nSigOps += txin.scriptSig.GetSigOpCount(false);
+ }
}
+
foreach (var txout in vout)
{
nSigOps += txout.scriptPubKey.GetSigOpCount(false);
@@ -186,7 +211,7 @@ namespace Novacoin
}
// Check for empty or overflow output values
- ulong nValueOut = 0;
+ long nValueOut = 0;
for (int i = 0; i < vout.Length; i++)
{
CTxOut txout = vout[i];
@@ -251,9 +276,9 @@ namespace Novacoin
}
if (nBlockTime == 0)
{
- nBlockTime = NetUtils.GetAdjustedTime();
+ nBlockTime = NetInfo.GetAdjustedTime();
}
- if (nLockTime < (nLockTime < NetUtils.nLockTimeThreshold ? nBlockHeight : nBlockTime))
+ if (nLockTime < (nLockTime < NetInfo.nLockTimeThreshold ? nBlockHeight : nBlockTime))
{
return true;
}
@@ -266,7 +291,7 @@ namespace Novacoin
}
return true;
}
-
+
///
/// Parse byte sequence and initialize new instance of CTransaction
///
@@ -304,7 +329,7 @@ namespace Novacoin
{
// Fill outputs array
vout[nCurrentOutput] = new CTxOut();
- vout[nCurrentOutput].nValue = reader.ReadUInt64();
+ vout[nCurrentOutput].nValue = reader.ReadInt64();
int nScriptPKLen = (int)VarInt.ReadVarInt(ref reader);
vout[nCurrentOutput].scriptPubKey = new CScript(reader.ReadBytes(nScriptPKLen));
@@ -321,11 +346,11 @@ namespace Novacoin
///
/// Serialized size
///
- public int Size
+ public uint Size
{
get
{
- int nSize = 12; // nVersion, nTime, nLockLime
+ uint nSize = 12; // nVersion, nTime, nLockLime
nSize += VarInt.GetEncodedSize(vin.Length);
nSize += VarInt.GetEncodedSize(vout.Length);
@@ -407,11 +432,11 @@ namespace Novacoin
///
/// Amount of novacoins spent by this transaction.
///
- public ulong ValueOut
+ public long nValueOut
{
get
{
- ulong nValueOut = 0;
+ long nValueOut = 0;
foreach (var txout in vout)
{
nValueOut += txout.nValue;
@@ -473,6 +498,197 @@ namespace Novacoin
return sb.ToString();
}
- public static bool MoneyRange(ulong nValue) { return (nValue <= nMaxMoney); }
+ public static bool MoneyRange(long nValue) { return (nValue <= nMaxMoney); }
+
+ ///
+ /// Get total sigops.
+ ///
+ /// Inputs map.
+ /// Amount of sigops.
+ public uint GetP2SHSigOpCount(ref Dictionary inputs)
+ {
+ if (IsCoinBase)
+ {
+ return 0;
+ }
+
+ uint nSigOps = 0;
+ for (var i = 0; i < vin.Length; i++)
+ {
+ var prevout = GetOutputFor(vin[i], ref inputs);
+ if (prevout.scriptPubKey.IsPayToScriptHash)
+ {
+ nSigOps += prevout.scriptPubKey.GetSigOpCount(vin[i].scriptSig);
+ }
+ }
+
+ return nSigOps;
+ }
+
+ ///
+ /// Get sum of inputs spent by this transaction.
+ ///
+ /// Reference to innputs map.
+ /// Sum of inputs.
+ public long GetValueIn(ref Dictionary inputs)
+ {
+ if (IsCoinBase)
+ {
+ return 0;
+ }
+
+ long nResult = 0;
+ for (int i = 0; i < vin.Length; i++)
+ {
+ nResult += GetOutputFor(vin[i], ref inputs).nValue;
+ }
+
+ return nResult;
+ }
+
+ ///
+ /// Helper method to find output in the map.
+ ///
+ /// Transaction input.
+ /// eference to inuts map.
+ /// Parent output.
+ private CTxOut GetOutputFor(CTxIn input, ref Dictionary inputs)
+ {
+ if (!inputs.ContainsKey(input.prevout))
+ {
+ throw new Exception("No such input");
+ }
+
+ var outItem = inputs[input.prevout];
+
+ return new CTxOut(outItem.nValue, outItem.scriptPubKey);
+ }
+
+ ///
+ /// Calculate coin*age.
+ ///
+ /// Note, only those coins meeting minimum age requirement counts.
+ ///
+ /// Inputs set.
+ /// Coin age calculation result.
+ /// Result
+ public bool GetCoinAge(ref Dictionary inputs, out long nCoinAge)
+ {
+ BigInteger bnCentSecond = 0; // coin age in the unit of cent-seconds
+ nCoinAge = 0;
+
+ if (IsCoinBase)
+ {
+ // Nothing spent by coinbase, coinage is always zero.
+ return true;
+ }
+
+ for( var i = 0; i nTime)
+ {
+ continue; // only count coins meeting min age requirement
+ }
+
+ long nValueIn = input.nValue;
+ bnCentSecond += new BigInteger(nValueIn) * (nTime - merkleItem.nTime) / nCent;
+ }
+
+ BigInteger bnCoinDay = bnCentSecond * nCent / nCoin / (24 * 60 * 60);
+ nCoinAge = (long)bnCoinDay;
+
+ return true;
+ }
+
+ public long GetMinFee(uint nBlockSize, bool fAllowFree, MinFeeMode mode)
+ {
+ long nMinTxFee = CTransaction.nMinTxFee, nMinRelayTxFee = CTransaction.nMinRelayTxFee;
+ uint nBytes = Size;
+
+ if (IsCoinStake)
+ {
+ // Enforce 0.01 as minimum fee for old approach or coinstake
+ nMinTxFee = nCent;
+ nMinRelayTxFee = nCent;
+
+ if (nTime < NetInfo.nStakeValidationSwitchTime)
+ {
+ // Enforce zero size for compatibility with old blocks.
+ nBytes = 0;
+ }
+ }
+
+ // Base fee is either nMinTxFee or nMinRelayTxFee
+ long nBaseFee = (mode == MinFeeMode.GMF_RELAY) ? nMinRelayTxFee : nMinTxFee;
+
+ uint nNewBlockSize = nBlockSize + nBytes;
+ long nMinFee = (1 + (long)nBytes / 1000) * nBaseFee;
+
+ if (fAllowFree)
+ {
+ if (nBlockSize == 1)
+ {
+ // Transactions under 1K are free
+ if (nBytes < 1000)
+ nMinFee = 0;
+ }
+ else
+ {
+ // Free transaction area
+ if (nNewBlockSize < 27000)
+ nMinFee = 0;
+ }
+ }
+
+ // To limit dust spam, require additional MIN_TX_FEE/MIN_RELAY_TX_FEE for
+ // each non empty output which is less than 0.01
+ //
+ // It's safe to ignore empty outputs here, because these inputs are allowed
+ // only for coinbase and coinstake transactions.
+ foreach (var txout in vout)
+ {
+ if (txout.nValue < nCent && !txout.IsEmpty)
+ {
+ nMinFee += nBaseFee;
+ }
+ }
+
+ var nMaxBlockSizeGen = CBlock.nMaxBlockSize / 2;
+
+ // Raise the price as the block approaches full
+ if (nBlockSize != 1 && nNewBlockSize >= nMaxBlockSizeGen / 2)
+ {
+ if (nNewBlockSize >= nMaxBlockSizeGen)
+ {
+ return nMaxMoney;
+ }
+
+ nMinFee *= nMaxBlockSizeGen / (nMaxBlockSizeGen - nNewBlockSize);
+ }
+
+ if (!MoneyRange(nMinFee))
+ {
+ nMinFee = nMaxMoney;
+ }
+
+ return nMinFee;
+ }
}
}