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                 /// Hash of parent transaction.
  14                 /// </summary>
  15                 public Hash256 txID = new Hash256();
  16
  17                 /// <summary>
  18                 /// Parent input number.
  19                 /// </summary>
  20         public uint n = 0;
  21
  22                 /// <summary>
  23                 /// First half of script, signatures for the scriptPubKey
  24                 /// </summary>
  25         public CScript scriptSig;
  26
  27                 /// <summary>
  28                 /// Transaction variant number, irrelevant if nLockTime isn't specified. Its value is 0xffffffff by default.
  29                 /// </summary>
  30         public uint nSequence = 0xffffffff;
  31
  32         /// <summary>
  33         /// Initialize new CTxIn instance as copy of another one.
  34         /// </summary>
  35         /// <param name="i">CTxIn instance.</param>
  36         public CTxIn(CTxIn i)
  37         {
  38             txID = i.txID;
  39             n = i.n;
  40             scriptSig = i.scriptSig;
  41             nSequence = i.nSequence;
  42         }
  43
  44         /// <summary>
  45         /// Initialize an empty instance of CTxIn class
  46         /// </summary>
  47         public CTxIn()
  48         {
  49         }
  50
  51         /// <summary>
  52         /// Read vin list from byte sequence.
  53         /// </summary>
  54         /// <param name="wBytes">Reference to byte sequence</param>
  55         /// <returns>Inputs array</returns>
  56         public static CTxIn[] ReadTxInList(ref WrappedList<byte> wBytes)
  57         {
  58             CTxIn[] vin;
  59
  60             // Get amount
  61             int nInputs = (int)VarInt.ReadVarInt(ref wBytes);
  62             vin = new CTxIn[nInputs];
  63
  64             for (int nIndex = 0; nIndex < nInputs; nIndex++)
  65             {
  66                 // Fill inputs array
  67                 vin[nIndex] = new CTxIn();
  68
  69                 vin[nIndex].txID = new Hash256(wBytes.GetItems(32));
  70                 vin[nIndex].n = BitConverter.ToUInt32(wBytes.GetItems(4), 0);
  71                 vin[nIndex].scriptSig = new CScript(wBytes.GetItems((int)VarInt.ReadVarInt(ref wBytes)));
  72                 vin[nIndex].nSequence = BitConverter.ToUInt32(wBytes.GetItems(4), 0);
  73             }
  74
  75             // Return inputs array
  76             return vin;
  77         }
  78
  79         /// <summary>
  80         /// Get raw bytes representation of our input.
  81         /// </summary>
  82         /// <returns>Byte sequence.</returns>
  83         public IList<byte> Bytes
  84         {
  85             get
  86             {
  87                 List<byte> inputBytes = new List<byte>();
  88
  89                 inputBytes.AddRange(txID.hashBytes); // Input transaction id
  90                 inputBytes.AddRange(BitConverter.GetBytes(n)); // Output number
  91
  92                 List<byte> s = new List<byte>(scriptSig.Bytes);
  93
  94                 inputBytes.AddRange(VarInt.EncodeVarInt(s.Count)); // scriptSig length
  95                 inputBytes.AddRange(s); // scriptSig
  96                 inputBytes.AddRange(BitConverter.GetBytes(nSequence)); // Sequence
  97
  98                 return inputBytes;
  99             }
 100         }
 101
 102         public bool IsCoinBase
 103         {
 104             get { return txID.IsZero; }
 105         }
 106
 107                 public override string ToString ()
 108                 {
 109                         StringBuilder sb = new StringBuilder ();
 110
 111             if (IsCoinBase)
 112             {
 113                 sb.AppendFormat("CTxIn(txId={0}, coinbase={2}, nSequence={3})", txID.ToString(), n, Interop.ToHex(scriptSig.Bytes), nSequence);
 114             }
 115             else
 116             {
 117                 sb.AppendFormat("CTxIn(txId={0}, n={1}, scriptSig={2}, nSequence={3})", txID.ToString(), n, scriptSig.ToString(), nSequence);
 118             }
 119
 120                         return sb.ToString ();
 121                 }
 122
 123         }
 124 }
 125