X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FCTransaction.cs;h=3ebde5f070f129c326da42bd816023b22cc005c1;hb=c4aad1332d39a5bdd66e9e8004932dc99baf44e5;hp=10707034a25772896bcecc8c4b698559917d36a2;hpb=886861c2656fd556145c7d46a2002c169dacc2f6;p=NovacoinLibrary.git
diff --git a/Novacoin/CTransaction.cs b/Novacoin/CTransaction.cs
index 1070703..3ebde5f 100644
--- a/Novacoin/CTransaction.cs
+++ b/Novacoin/CTransaction.cs
@@ -20,6 +20,8 @@ using System;
using System.Text;
using System.Collections.Generic;
using System.IO;
+using System.Diagnostics.Contracts;
+using System.Numerics;
namespace Novacoin
{
@@ -47,19 +49,36 @@ namespace Novacoin
public class CTransaction
{
///
+ /// One cent = 10000 satoshis.
+ ///
+ public const ulong nCent = 10000;
+
+ ///
/// One coin = 1000000 satoshis.
///
public const ulong nCoin = 1000000;
+
///
/// Sanity checking threshold.
///
public const ulong nMaxMoney = 2000000000 * nCoin;
+ public const ulong nMinTxFee = nCent / 10;
+ public const ulong nMinRelayTxFee = nCent / 50;
+ public const ulong 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.
///
@@ -137,15 +156,15 @@ namespace Novacoin
return true;
}
- CTransaction txPrev = null;
+ TxOutItem txOutCursor = null;
for (int i = 0; i < vin.Length; i++)
{
var outpoint = vin[i].prevout;
- if (!CBlockStore.Instance.GetTransaction(outpoint.hash, ref txPrev))
+ if (!CBlockStore.Instance.GetTxOutCursor(outpoint, ref 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;
}
@@ -250,9 +269,9 @@ 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;
}
@@ -265,7 +284,7 @@ namespace Novacoin
}
return true;
}
-
+
///
/// Parse byte sequence and initialize new instance of CTransaction
///
@@ -320,11 +339,11 @@ 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);
@@ -398,9 +417,26 @@ namespace Novacoin
///
/// Transaction hash
///
- public Hash256 Hash
+ public uint256 Hash
+ {
+ get { return CryptoUtils.ComputeHash256(this); }
+ }
+
+ ///
+ /// Amount of novacoins spent by this transaction.
+ ///
+ public ulong nValueOut
{
- get { return Hash256.Compute256(this); }
+ get
+ {
+ ulong nValueOut = 0;
+ foreach (var txout in vout)
+ {
+ nValueOut += txout.nValue;
+ Contract.Assert(MoneyRange(txout.nValue) && MoneyRange(nValueOut));
+ }
+ return nValueOut;
+ }
}
///
@@ -456,5 +492,148 @@ namespace Novacoin
}
public static bool MoneyRange(ulong 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 ulong GetValueIn(ref Dictionary inputs)
+ {
+ if (IsCoinBase)
+ {
+ return 0;
+ }
+
+ ulong 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);
+ }
+
+ internal bool GetCoinAge(ref Dictionary inputs, out ulong nCoinAge)
+ {
+ throw new NotImplementedException();
+ }
+
+ public ulong GetMinFee(uint nBlockSize, bool fAllowFree, MinFeeMode mode)
+ {
+ ulong 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
+ ulong nBaseFee = (mode == MinFeeMode.GMF_RELAY) ? nMinRelayTxFee : nMinTxFee;
+
+ uint nNewBlockSize = nBlockSize + nBytes;
+ ulong nMinFee = (1 + (ulong)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;
+ }
}
}