Novacoin/CTransaction.cs

   1 \feffusing System;
   2 using System.Text;
   3 using System.Collections.Generic;
   4
   5 namespace Novacoin
   6 {
   7         /// <summary>
   8         /// Represents the transaction. Any transaction must provide one input and one output at least.
   9         /// </summary>
  10         public class CTransaction
  11         {
  12                 /// <summary>
  13                 /// Version of transaction schema.
  14                 /// </summary>
  15                 public uint nVersion = 1;
  16
  17                 /// <summary>
  18                 /// Transaction timestamp.
  19                 /// </summary>
  20                 public uint nTime = 0;
  21
  22                 /// <summary>
  23                 /// Array of transaction inputs
  24                 /// </summary>
  25                 public CTxIn[] inputs;
  26
  27                 /// <summary>
  28                 /// Array of transaction outputs
  29                 /// </summary>
  30                 public CTxOut[] outputs;
  31
  32                 /// <summary>
  33                 /// Block height or timestamp when transaction is final
  34                 /// </summary>
  35                 public uint nLockTime = 0;
  36
  37         /// <summary>
  38         /// Initialize an empty instance
  39         /// </summary>
  40         public CTransaction()
  41         {
  42         }
  43
  44         /// <summary>
  45         /// Parse byte sequence and initialize new instance of CTransaction
  46         /// </summary>
  47         /// <param name="txBytes"></param>
  48                 public CTransaction (IList<byte> txBytes)
  49                 {
  50             WrappedList<byte> wBytes = new WrappedList<byte>(txBytes);
  51
  52             nVersion = Interop.LEBytesToUInt32(wBytes.GetItems(4));
  53             nTime = Interop.LEBytesToUInt32(wBytes.GetItems(4));
  54
  55             int nInputs = (int)VarInt.ReadVarInt(ref wBytes);
  56             inputs = new CTxIn[nInputs];
  57
  58             for (int nCurrentInput = 0; nCurrentInput < nInputs; nCurrentInput++)
  59             {
  60                 // Fill inputs array
  61                 inputs[nCurrentInput] = new CTxIn();
  62
  63                 inputs[nCurrentInput].txID = new Hash256(wBytes.GetItems(32));
  64                 inputs[nCurrentInput].n = Interop.LEBytesToUInt32(wBytes.GetItems(4));
  65                 inputs[nCurrentInput].scriptSig = wBytes.GetItems((int)VarInt.ReadVarInt(ref wBytes));
  66                 inputs[nCurrentInput].nSequence = Interop.LEBytesToUInt32(wBytes.GetItems(4));
  67             }
  68
  69             int nOutputs = (int)VarInt.ReadVarInt(ref wBytes);
  70             outputs = new CTxOut[nOutputs];
  71
  72             for (int nCurrentOutput = 0; nCurrentOutput < nOutputs; nCurrentOutput++)
  73             {
  74                 // Fill outputs array
  75                 outputs[nCurrentOutput] = new CTxOut();
  76                 outputs[nCurrentOutput].nValue = Interop.LEBytesToUInt64(wBytes.GetItems(8));
  77                 outputs[nCurrentOutput].scriptPubKey = wBytes.GetItems((int)VarInt.ReadVarInt(ref wBytes));
  78             }
  79
  80             nLockTime = Interop.LEBytesToUInt32(wBytes.GetItems(4));
  81                 }
  82
  83         /// <summary>
  84         /// Read transactions array which is encoded in the block body.
  85         /// </summary>
  86         /// <param name="wTxBytes">Bytes sequence</param>
  87         /// <returns>Transactions array</returns>
  88         public static CTransaction[] ReadTransactionsList(ref WrappedList<byte> wTxBytes)
  89         {
  90             CTransaction[] tx;
  91
  92             // Read amount of transactions
  93             int nTransactions = (int) VarInt.ReadVarInt(ref wTxBytes);
  94             tx = new CTransaction[nTransactions];
  95
  96             for (int nTx = 0; nTx < nTransactions; nTx++)
  97             {
  98                 // Fill the transactions array
  99                 tx[nTx] = new CTransaction();
 100
 101                 tx[nTx].nVersion = Interop.LEBytesToUInt32(wTxBytes.GetItems(4));
 102                 tx[nTx].nTime = Interop.LEBytesToUInt32(wTxBytes.GetItems(4));
 103
 104                 // Inputs array
 105                 tx[nTx].inputs = CTxIn.ReadTxInList(ref wTxBytes);
 106
 107                 // outputs array
 108                 tx[nTx].outputs = CTxOut.ReadTxOutList(ref wTxBytes);
 109
 110                 tx[nTx].nLockTime = Interop.LEBytesToUInt32(wTxBytes.GetItems(4));
 111             }
 112
 113             return tx;
 114         }
 115
 116         public IList<byte> ToBytes()
 117         {
 118             List<byte> resultBytes = new List<byte>();
 119
 120             // Typical transaction example:
 121             //
 122             // 01000000 -- version
 123             // 78b4c953 -- timestamp
 124             // 06       -- amount of txins
 125             // 340d96b77ec4ee9d42b31cadc2fab911e48d48c36274d516f226d5e85bbc512c -- txin hash
 126             // 01000000 -- txin outnumber
 127             // 6b       -- txin scriptSig length
 128             // 483045022100c8df1fc17b6ea1355a39b92146ec67b3b53565e636e028010d3a8a87f6f805f202203888b9b74df03c3960773f2a81b2dfd1efb08bb036a8f3600bd24d5ed694cd5a0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
 129             // ffffffff -- txin nSequence
 130             // 364c640420de8fa77313475970bf09ce4d0b1f8eabb8f1d6ea49d90c85b202ee -- txin hash
 131             // 01000000 -- txin outnumber
 132             // 6b       -- txin scriptSig length
 133             // 483045022100b651bf3a6835d714d2c990c742136d769258d0170c9aac24803b986050a8655b0220623651077ff14b0a9d61e30e30f2c15352f70491096f0ec655ae1c79a44e53aa0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
 134             // ffffffff -- txin nSequence
 135             // 7adbd5f2e521f567bfea2cb63e65d55e66c83563fe253464b75184a5e462043d -- txin hash
 136             // 00000000 -- txin outnumber
 137             // 6a       -- txin scriptSig length
 138             // 4730440220183609f2b995993acc9df241aff722d48b9a731b0cd376212934565723ed81f00220737e7ce75ef39bdc061d0dcdba3ee24e43b899696a7c96803cee0a79e1f78ecb0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
 139             // ffffffff -- txin nSequence
 140             // 999eb03e00a41c2f9fde8865a554ceebbc48d30f4c8ba22dd88da8c9b46fa920 -- txin hash
 141             // 03000000 -- txin outnumber
 142             // 6b       -- txin scriptSig length
 143             // 483045022100ec1ab104ef086ba79b0f2611ebf1bfdd22a7a1020f6630fa1c6707546626e0db022056093d4048a999392185ccc735ef736a5497bd68f60b42e6c0c93ba770b54d010121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
 144             // ffffffff -- txin nSequence
 145             // c0543b86be257ddd85b014a76718a70fab9eaa3c477460e4ca187094d86f369c -- txin hash
 146             // 05000000 -- txin outnumber
 147             // 69       -- txin scriptSig length
 148             // 463043021f24275c72f952043174daf01d7f713f878625f0522124a3cab48a0a2e12604202201b47742e6697b0ebdd1e4ba49c74baf142a0228ad0e0ee847488994c9dce78470121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
 149             // ffffffff -- txin nSequence
 150             // e1793d4519147782293dd1db6d90e461265d91db2cc6889c37209394d42ad10d -- txin hash
 151             // 05000000 -- txin outnumber
 152             // 6a       -- txin scriptSig length
 153             // 473044022018a0c3d73b2765d75380614ab36ee8e3c937080894a19166128b1e3357b208fb0220233c9609985f535547381431526867ad0255ec4969afe5c360544992ed6b3ed60121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
 154             // ffffffff -- txin nSequence
 155             // 02 -- amount of txouts
 156             // e542000000000000 -- txout value
 157             // 19 -- scriptPubKey length
 158             // 76a91457d84c814b14bd86bf32f106b733baa693db7dc788ac -- scriptPubKey
 159             // 409c000000000000 -- txout value
 160             // 19 -- scriptPubKey length
 161             // 76a91408c8768d5d6bf7c1d9609da4e766c3f1752247b188ac -- scriptPubKey
 162             // 00000000 -- lock time
 163
 164             resultBytes.AddRange(Interop.LEBytes(nVersion));
 165             resultBytes.AddRange(Interop.LEBytes(nTime));
 166             resultBytes.AddRange(VarInt.EncodeVarInt(inputs.LongLength));
 167
 168             foreach(CTxIn input in inputs)
 169             {
 170                 resultBytes.AddRange(input.ToBytes());
 171             }
 172
 173             resultBytes.AddRange(VarInt.EncodeVarInt(outputs.LongLength));
 174
 175             foreach(CTxOut output in outputs)
 176             {
 177                 resultBytes.AddRange(output.ToBytes());
 178             }
 179
 180             resultBytes.AddRange(Interop.LEBytes(nLockTime));
 181
 182             return resultBytes;
 183         }
 184
 185         public override string ToString()
 186         {
 187             StringBuilder sb = new StringBuilder();
 188
 189             sb.AppendFormat("CTransaction(\n nVersion={0},\n nTime={1},\n", nVersion, nTime);
 190
 191             foreach (CTxIn txin in inputs)
 192             {
 193                 sb.AppendFormat(" {0},\n", txin.ToString());
 194             }
 195
 196             foreach (CTxOut txout in outputs)
 197             {
 198                 sb.AppendFormat(" {0},\n", txout.ToString());
 199             }
 200
 201             sb.AppendFormat("nLockTime={0})\n", nLockTime);
 202
 203             return sb.ToString();
 204         }
 205         }
 206 }
 207