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 byte[] 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         public static CTxIn[] ReadTxInList(ref WrappedList<byte> wBytes)
  52         {
  53             CTxIn[] vin;
  54
  55             // Get amount
  56             int nInputs = (int)VarInt.ReadVarInt(ref wBytes);
  57             vin = new CTxIn[nInputs];
  58
  59             for (int nIndex = 0; nIndex < nInputs; nIndex++)
  60             {
  61                 // Fill inputs array
  62                 vin[nIndex] = new CTxIn();
  63
  64                 vin[nIndex].txID = new Hash256(wBytes.GetItems(32));
  65                 vin[nIndex].n = Interop.LEBytesToUInt32(wBytes.GetItems(4));
  66                 vin[nIndex].scriptSig = wBytes.GetItems((int)VarInt.ReadVarInt(ref wBytes));
  67                 vin[nIndex].nSequence = Interop.LEBytesToUInt32(wBytes.GetItems(4));
  68             }
  69
  70             // Return inputs array
  71             return vin;
  72         }
  73
  74         /// <summary>
  75         /// Get raw bytes representation of our input.
  76         /// </summary>
  77         /// <returns>Byte sequence.</returns>
  78         public IList<byte> ToBytes()
  79         {
  80             List<byte> inputBytes = new List<byte>();
  81
  82             inputBytes.AddRange(txID.hashBytes); // Input transaction id
  83             inputBytes.AddRange(Interop.LEBytes(n)); // Output number
  84             inputBytes.AddRange(VarInt.EncodeVarInt(scriptSig.LongLength)); // scriptSig length
  85             inputBytes.AddRange(scriptSig); // scriptSig
  86             inputBytes.AddRange(Interop.LEBytes(nSequence)); // Sequence
  87
  88             return inputBytes;
  89         }
  90
  91         public bool IsCoinBase()
  92         {
  93             return txID.IsZero();
  94         }
  95
  96                 public override string ToString ()
  97                 {
  98                         StringBuilder sb = new StringBuilder ();
  99
 100             if (IsCoinBase())
 101             {
 102                 sb.AppendFormat("CTxIn(txId={0},coinbase={2},nSequence={3})", txID.ToString(), n, Interop.ToHex(scriptSig), nSequence);
 103             }
 104             else
 105             {
 106                 sb.AppendFormat("CTxIn(txId={0},n={1},scriptSig={2},nSequence={3})", txID.ToString(), n, (new CScript(scriptSig)).ToString(), nSequence);
 107             }
 108
 109                         return sb.ToString ();
 110                 }
 111
 112         }
 113 }
 114