Novacoin/CTxIn.cs

   1 \feffusing System;
   2 using System.Text;
   3 using System.Collections.Generic;
   4
   5 namespace Novacoin
   6 {
   7         /// <summary>
   8         /// Transaction input.
   9         /// </summary>
  10         public class CTxIn
  11         {
  12         /// <summary>
  13         /// Previous input data
  14         /// </summary>
  15         public COutPoint prevout;
  16
  17                 /// <summary>
  18                 /// First half of script, signatures for the scriptPubKey
  19                 /// </summary>
  20         public CScript scriptSig;
  21
  22                 /// <summary>
  23                 /// Transaction variant number, irrelevant if nLockTime isn't specified. Its value is 0xffffffff by default.
  24                 /// </summary>
  25         public uint nSequence = uint.MaxValue;
  26
  27         /// <summary>
  28         /// Initialize new CTxIn instance as copy of another one.
  29         /// </summary>
  30         /// <param name="i">CTxIn instance.</param>
  31         public CTxIn(CTxIn i)
  32         {
  33             prevout = new COutPoint(i.prevout);
  34             scriptSig = i.scriptSig;
  35             nSequence = i.nSequence;
  36         }
  37
  38         /// <summary>
  39         /// Initialize an empty instance of CTxIn class
  40         /// </summary>
  41         public CTxIn()
  42         {
  43             prevout = new COutPoint();
  44             scriptSig = new CScript();
  45         }
  46
  47         /// <summary>
  48         /// Read vin list from byte sequence.
  49         /// </summary>
  50         /// <param name="wBytes">Reference to byte sequence</param>
  51         /// <returns>Inputs array</returns>
  52         public static CTxIn[] ReadTxInList(ref WrappedList<byte> wBytes)
  53         {
  54             CTxIn[] vin;
  55
  56             // Get amount
  57             int nInputs = (int)VarInt.ReadVarInt(ref wBytes);
  58             vin = new CTxIn[nInputs];
  59
  60             for (int nIndex = 0; nIndex < nInputs; nIndex++)
  61             {
  62                 // Fill inputs array
  63                 vin[nIndex] = new CTxIn();
  64                 vin[nIndex].prevout = new COutPoint(wBytes.GetItems(36));
  65                 vin[nIndex].scriptSig = new CScript(wBytes.GetItems((int)VarInt.ReadVarInt(ref wBytes)));
  66                 vin[nIndex].nSequence = BitConverter.ToUInt32(wBytes.GetItems(4), 0);
  67             }
  68
  69             // Return inputs array
  70             return vin;
  71         }
  72
  73         /// <summary>
  74         /// Get raw bytes representation of our input.
  75         /// </summary>
  76         /// <returns>Byte sequence.</returns>
  77         public IList<byte> Bytes
  78         {
  79             get
  80             {
  81                 List<byte> inputBytes = new List<byte>();
  82
  83                 inputBytes.AddRange(prevout.Bytes); // prevout
  84
  85                 List<byte> s = new List<byte>(scriptSig.Bytes);
  86
  87                 inputBytes.AddRange(VarInt.EncodeVarInt(s.Count)); // scriptSig length
  88                 inputBytes.AddRange(s); // scriptSig
  89                 inputBytes.AddRange(BitConverter.GetBytes(nSequence)); // Sequence
  90
  91                 return inputBytes;
  92             }
  93         }
  94
  95         public bool IsFinal
  96         {
  97             get { return (nSequence == uint.MaxValue); }
  98         }
  99         public override string ToString ()
 100                 {
 101                         StringBuilder sb = new StringBuilder ();
 102
 103             sb.AppendFormat("CTxIn(");
 104             sb.Append(prevout.ToString());
 105
 106             if(prevout.IsNull)
 107             {
 108                 sb.AppendFormat(", coinbase={0}", Interop.ToHex(scriptSig.Bytes));
 109             }
 110             else
 111             {
 112                 sb.AppendFormat(", scriptsig={0}", scriptSig.ToString());
 113             }
 114
 115             if (nSequence != uint.MaxValue)
 116             {
 117                 sb.AppendFormat(", nSequence={0}", nSequence);
 118             }
 119
 120             sb.Append(")");
 121
 122
 123             return sb.ToString ();
 124                 }
 125
 126         }
 127 }
 128