ConnectInputs + stubs for GetCoinAge, GetMinFee and GetProofOfStakeReward.

[NovacoinLibrary.git] / Novacoin / CTransaction.cs

diff --git a/Novacoin/CTransaction.cs b/Novacoin/CTransaction.cs
index fb865a4..b0d4f08 100644 (file)
--- 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
 {
@@ -47,6 +49,11 @@ namespace Novacoin
     public class CTransaction
     {
         /// <summary>
+        /// One cent = 10000 satoshis.
+        /// </summary>
+        public const ulong nCent = 10000;
+
+        /// <summary>
         /// One coin = 1000000 satoshis.
         /// </summary>
         public const ulong nCoin = 1000000;
@@ -60,6 +67,13 @@ namespace Novacoin
         /// </summary>
         public const uint nMaxTxSize = 250000;
 
+        public enum MinFeeMode
+        {
+            GMF_BLOCK,
+            GMF_RELAY,
+            GMF_SEND,
+        }
+
         /// <summary>
         /// Version of transaction schema.
         /// </summary>
@@ -137,15 +151,15 @@ 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 +264,9 @@ 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 +279,7 @@ namespace Novacoin
             }
             return true;
         }
-        
+
         /// <summary>
         /// Parse byte sequence and initialize new instance of CTransaction
         /// </summary>
@@ -404,6 +418,23 @@ namespace Novacoin
         }
 
         /// <summary>
+        /// Amount of novacoins spent by this transaction.
+        /// </summary>
+        public ulong nValueOut
+        {
+            get
+            {
+                ulong nValueOut = 0;
+                foreach (var txout in vout)
+                {
+                    nValueOut += txout.nValue;
+                    Contract.Assert(MoneyRange(txout.nValue) && MoneyRange(nValueOut));
+                }
+                return nValueOut;
+            }
+        }
+
+        /// <summary>
         /// A sequence of bytes, which corresponds to the current state of CTransaction.
         /// </summary>
         public static implicit operator byte[] (CTransaction tx)
@@ -456,5 +487,79 @@ namespace Novacoin
         }
 
         public static bool MoneyRange(ulong nValue) { return (nValue <= nMaxMoney); }
+
+        /// <summary>
+        /// Get total sigops.
+        /// </summary>
+        /// <param name="inputs">Inputs map.</param>
+        /// <returns>Amount of sigops.</returns>
+        public uint GetP2SHSigOpCount(ref Dictionary<COutPoint, TxOutItem> 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;
+        }
+
+        /// <summary>
+        /// Get sum of inputs spent by this transaction.
+        /// </summary>
+        /// <param name="inputs">Reference to innputs map.</param>
+        /// <returns>Sum of inputs.</returns>
+        public ulong GetValueIn(ref Dictionary<COutPoint, TxOutItem> 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;
+        }
+
+        /// <summary>
+        /// Helper method to find output in the map.
+        /// </summary>
+        /// <param name="input">Transaction input.</param>
+        /// <param name="inputs">eference to inuts map.</param>
+        /// <returns>Parent output.</returns>
+        private CTxOut GetOutputFor(CTxIn input, ref Dictionary<COutPoint, TxOutItem> 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<COutPoint, TxOutItem> inputs, out ulong nCoinAge)
+        {
+            throw new NotImplementedException();
+        }
+
+        internal static ulong GetMinFee(int v1, bool v2, MinFeeMode gMF_BLOCK, int nTxSize)
+        {
+            throw new NotImplementedException();
+        }
     }
 }